Medical devices with distal control

ABSTRACT

A device comprises a tubular member with a longitudinal axis having a proximal end and a distal end, at least one partial cut located at, along or near the distal end of the tubular member, the at least one partial cut comprising an orientation that is angled relative to both the longitudinal axis and an axis transverse to the longitudinal axis, a pusher member positioned within an interior of the tubular member and configured to selectively advance the distal end of the tubular member longitudinally, wherein the distal end of the tubular member is configured to at least partially rotate when the pusher member is advanced relative to the tubular member so at to facilitate placement of the distal end in a particular branch of a subject&#39;s intraluminal network, wherein the distal end of the tubular member is configured to longitudinally elongate along or near an area of the at least one partial cut.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/660,811 filed Jul. 26, 2017, which is a continuation of PCTApplication PCT/US2017/041224 filed Jul. 7, 2017, which claims priorityto U.S. patent application Ser. No. 15/204,800 filed Jul. 7, 2016, toU.S. Provisional Patent Application No. 62/359,588 filed Jul. 7, 2016,and to U.S. Provisional Patent Application No. 62/467,229 filed Mar. 5,2017. This application claims priority to U.S. Provisional PatentApplication No. 62/467,229 filed Mar. 5, 2017. This application is acontinuation-in-part of U.S. patent application Ser. No. 15/204,800filed Jul. 7, 2016. The contents of each of the foregoing applicationsare incorporated herein by reference in their entireties.

BACKGROUND Field

The disclosure is in the general field of surgical instruments andrelates specifically to catheters, guidewires, endoscopes and endoscopicdevices that are used in minimally invasive procedures, such ascardiovascular and endovascular procedures to facilitate the placementof devices within endoluminal structures within the body, such as, butnot limited to, blood vessels, the gastrointestinal tract and thegenitourinary tract.

Description

Catheters, guidewires, endoscopes and associated endoscopic instrumentshave been used to diagnose and treat conditions by accessing luminalstructures of the body. Luminal structures of the body may include, butare not limited to, blood vessels, the heart, the gastrointestinal (GI)tract, genitourinary (GU) tract, peritoneal cavity, thoracic cavity, themediastinum, bronchial passages, subarachnoidal spaces, and theintracranial ventricular system. Catheters, guidewires, and endoscopesmay be used in laparoscopic surgeries and other procedures whereinvasiveness is to be minimized. These devices are manipulated bytransmitting forces from the proximal end (i.e. the end of the deviceexternal to the body) to the distal end (i.e. the end of the devicewithin the body) along and through the longitudinal structure of thedevice. Precise control of the distal portion of the device is requiredfor medical procedures, so as to precisely cannulate the desired luminalstructure, such as a blood vessel. In order to achieve this, in someembodiments, multiple design criteria considered during the designprocess of endoluminal devices, such as a guidewires and catheters.Major design criteria include push-ability, torque-ability, andflexibility.

Push-ability refers to the ability to move the device along thelongitudinal axis of the device, resulting in translational motion.Push-ability is directly dependent on the stiffness of the device, whichis largely dependent on the modulus of elasticity of the materialemployed within the device. Devices with a high modulus of elasticityare able to transmit force along the length of the device effectively,while devices with a low modulus of elasticity do not transmit forcealong the device as effectively, resulting in deformation or buckling ofthe device.

Torque-ability refers to the ability of rotational motion to betransmitted along the length of the device and is directly dependent onthe modulus of rigidity (or shear modulus) of the material employedwithin the device. Devices having a high modulus of rigidity are able totransmit torque along the length of the device effectively, whiledevices having a low modulus of rigidity do not transmit force along thedevice as effectively.

Flexibility refers to the ability of a device to bend and flex along itslateral axis. Flexibility is necessary to enable the device to followthe bends and turns that are present in the human vasculature.Flexibility may be affected by the type of material and/or structuralfactors, such as the spacing and size of slits in the device that allowbending. However, flexibility is inversely dependent to the modulus ofelasticity and modulus of rigidity and thus comes at the expense ofpush-ability and torque-ability.

Ideally a device, such as a catheter, guidewire, endoscope or endoscopicinstrument, will demonstrate one-to-one rotation of the distal end withrespect to the proximal end. For example, if the proximal end of adevice is rotated 90 degrees clockwise, the distal end of the devicewill also rotate 90 degrees clockwise. Unfortunately, in practice thisdoes not typically occur, especially when the device has one or morebends or loops along its length secondary to the tortuous path of thebodily luminal structures. The inherent tortuosity of bodily structures(blood vessels, GI and GU tracts) means that portions of the device aresubjected to frictional forces as the device is maneuvered within thebody.

These frictional forces can impede the transmission of forces from theproximal end to the distal end of a device. One particularly problematicarea is torque transmission along a device. As a result, potentialenergy is oftentimes stored along the length of the device as theproximal end is rotated. As this stored up potential energy within thedevice overcomes the frictional forces that are being exerted along thedevice, a sudden rotation of the device when the potential energy isreleased, also known as “device whip,” can occur. This can makecannulating a desired vessel difficult and may cause injury to thepatient. Thus, current devices, such as catheters, guidewires endoscopesand endoscopic instruments, strive for a balance between stiffness andflexibility in a variety of ways. A need exists for improvedapparatuses, systems and methods for imparting precise, reliablerotational motion to the distal aspect of a medical device.

SUMMARY

According to some embodiments, a device comprises a tubular member witha longitudinal axis having a proximal end and a distal end, at least onepartial cut located at, along or near the distal end of the tubularmember, the at least one partial cut comprising an orientation that isangled relative to both the longitudinal axis and an axis transverse tothe longitudinal axis, a pusher member positioned within an interior ofthe tubular member and configured to selectively advance the distal endof the tubular member longitudinally, wherein the distal end of thetubular member is configured to at least partially rotate when thepusher member is advanced relative to the tubular member so at tofacilitate placement of the distal end in a particular branch of asubject's intraluminal network, wherein the distal end of the tubularmember is configured to longitudinally elongate along or near an area ofthe at least one partial cut.

According to some embodiments, a device comprises a tubular member witha longitudinal axis having a proximal end and a distal end, at least onepartial cut located at, along or near the distal end of the tubularmember, the at least one partial cut comprising an orientation that isangled relative to both the longitudinal axis and an axis transverse tothe longitudinal axis, and a pusher member positioned within an interiorof the tubular member and configured to selectively advance the distalend of the tubular member longitudinally, wherein movement of the pushermember relative to the tubular member converts longitudinal displacementinto rotational movement, causing the distal end of the tubular memberto at least partially rotate when the pusher member is advanced relativeto the tubular member so at to facilitate placement of the distal end ina particular branch of a subject's intraluminal network, wherein thedistal end of the tubular member is configured to longitudinallyelongate along or near an area of the at least one partial cut.

According to some embodiments, a method of selectively rotating a distalend of an intraluminal device comprises providing an intraluminal devicecomprising a tubular member and a pusher member configured to beselectively moved relative to the tubular member, wherein the tubularmember comprises at least one cut along a distal end of the tubularmember, wherein movement of the pusher member relative to the tubularmember, such that the pusher member moves the distal end of the tubularmember distally, causes the distal end of the tubular member toselectively rotate. The method further comprises moving the pushermember relative to the tubular member to selectively rotate the distalend of the device.

According to some embodiments, the at least one partial cut extendsthroughout an entire thickness of a wall of the tubular member. In someembodiments, the at least one partial cut does not extend throughout anentire thickness of a wall of the tubular member. In some embodiments,the at least one partial cut comprises a spiral or helical shape. Insome embodiments, an angle of the at least one partial cut relative tothe longitudinal axis is between 10 and 80 degrees (e.g., 10-15, 15-20,20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65, 65-70,70-75, 75-80 degrees, angles between the foregoing ranges, etc.)relative to the longitudinal axis of the device.

According to some embodiments, the pusher member is secured to thetubular member along the distal end of the tubular member. In certainarrangements, the pusher member is secure to the tubular member using atleast one of an adhesive and a mechanical connection. In otherembodiments, the pusher member is not secured to the tubular member(e.g., is configured to freely move and be removed relative to thetubular member). In one embodiment, the pusher member is configured toabut against at least one surface along an interior of the tubularmember to advance the tubular member distally when the pusher member ismoved sufficiently in a distal direction.

According to some embodiments, the tubular member comprises a lumenthrough which the pusher member is selectively moved. In someembodiments, the pusher member comprises a lumen.

According to some embodiments, the device further comprises at least oneouter member or coating positioned along an exterior of the tubularmember. In some embodiments, the device further comprises at least onepull member to facilitate steering of the device within an anatomy of asubject. In one embodiment, the pull member comprises a pull wire. Inone embodiment, the pull member comprises a shape memory material.

According to some embodiments, the pusher member comprises a coiledmember configured to maintain its structural integrity during use. Insome embodiments, the device additionally includes a handle assembly,wherein a first portion of the handle assembly is secured to the tubularmember and a second portion of the handle assembly is secured to thepusher member, wherein movement of the first portion relative to thesecond portion of the handle assembly facilitate movement of the tubularmember relative to the pusher member.

According to some embodiments, the at least one partial cut comprises asingle helix oriented in a single pitch direction. In other embodiments,the at least one partial cut comprises a dual chirality helix.

According to some embodiments, an intraluminal device comprises an outermember having at least one cut or feature that facilitates conversion oflinear movement of an inner member relative to the outer member intorotation of a distal portion of the device. Such rotational movement canfacilitate in maneuvering the distal end of the device through avasculature or other intraluminal structure of a subject (e.g., to reachor approach a desired anatomical location), as desired or required. Insome embodiments, as discussed in greater detail herein, theintraluminal device is configured to be directed to an intraluminallocation (e.g., intravascular, other intraluminal, anatomical location(e.g., through the subject's airways, gastroenterological system, etc.),etc.).

As discussed in greater detail herein, the various embodiments disclosedherein can provide advantageous devices, systems and/or methods tomanipulate the distal end of a medical device (e.g., catheter,microcatheter, sheath, other intraluminal device, etc.). In someembodiments, the device includes a tube or outer member comprising oneor more cuts (e.g., partial or complete cuts through the wall of thetube or outer member). In some embodiments, the cuts or similar featuresextend throughout the entire thickness of the tube or outer member.However, in other embodiments, the cuts extend only partially throughthe tube or outer member, as desired or required.

In some embodiments, the distal portion of the tube or outer membercomprises one or more cuts or other features. In some embodiments, suchcuts are helical or spiral in shape. In some embodiments, such helicalcuts have a constant or consistent orientation. However, in otherarrangements, the cuts have two or more orientations (e.g., angles,pitches, etc.) relative to the longitudinal axis, opening sizes, spacingand/or other properties, as desired or required. For example, in somearrangements, the cut(s) comprises/comprise a dual helix or dualchirality helix design. However, in other embodiments, the cutcomprises/comprise a single helix design (e.g., a cut having the samepitch, general direction of orientation, other properties and/or thelike).

According to some embodiments, a device comprises a tube or outermember, a pusher or inner member and one or more cuts or other featuresalong the distal end of the tube. In some embodiments, linear movementof the pusher member relative to the tube or outer member causesrotational movement (e.g., rotation, twisting, turning, etc.) of adistal portion of the tube. Such movement can help maneuver and/orotherwise manipulate the device through the vasculature or otherintraluminal system of a subject. In some embodiments, the tube or othermember is secured to the pusher or inner member along one or morelocations (e.g., the distal end of the device), using one or moresecurement (e.g., direct or indirect) methods, features, devices,technologies, etc.

In some embodiments, the cuts (e.g., partial or complete) through thetube or outer member comprise a helical or spiral shape. For example, insome embodiments, the cuts are angled relative to the longitudinal axisof the device (or a perpendicular axis of the longitudinal axis). Forexample, the helical angles can range from 10 to 80 degrees (e.g.,10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60,60-65, 65-70, 70-75, 75-80 degrees, angles between the foregoing ranges,etc.) relative to the longitudinal axis of the device. In someembodiments, the helical angle ranges from 15 to 75 degrees.

In some embodiments, the cuts are present only along or near the distalend of the tube or distal member. For example, the cut(s) is/are locatedalong the distal 0 to 20 percent (e.g., 0-1, 1-2, 2-3, 3-4, 4-5, 5-6,6-7, 7-8, 8-9, 9-10, 10-15, 15-20% of the tube and/or the device,percentages between the foregoing ranges and values, etc.).

According to some embodiments, the inner member, and thus the entireintraluminal device, is cannulated or otherwise comprises a lumen. Insome embodiments, such a device can allow for the passage of one or moreother devices, instruments and/or other members through its interior, asdesired or required. In some embodiments, the devices disclosed hereincomprise one or more external members, layers, coatings and/or othermembers.

The present disclosure is directed to a method and apparatus withrotation of the distal end of a medical device, such as a catheter,guidewire, chronic total occlusion crossing device, endoscope orendoscopic instrument, specifically, a medical device with a dualchirality helix converting linear movement into rotational movement atthe distal end.

One embodiment according to the present disclosure includes a medicaldevice comprising: a tubular member with a longitudinal axis having adistal end and a proximal end comprising: a distal aspect terminating atthe distal end with a distal helix formed by distal helical cutterminating at the proximal side of the distal aspect; a proximal aspectterminating at the proximal end with a proximal helix formed by proximalhelical cut terminating at the distal side of the proximal aspect,wherein the proximal helical cut is one of right or left handed and thedistal helical cut is the other of right and left handed; and a junctionwhere the distal aspect and the proximal aspect are joined; alongitudinal displacer disposed within the tubular member and slidablerelative to the tubular member; and a distal segment disposed aroundpart of the tubular member and coupled to the tubular member at thejunction. The distal helical cut has a distal helical cut width and theproximal helical cut has a proximal helical cut width and the distalhelical cut width may be equal to or different from the proximal helicalcut width and each of the helical cuts may range between about 0.1micrometers to about 30 millimeters. The helical cuts each have helicalcut angles which may be same or different in magnitude and may rangefrom about 10 to about 80 degrees. The tubular member may be made of oneor more of: polyimide, polyurethane, polyether block amide, nylon,nickel titanium, stainless steel braiding, and hollow helical strandedtubing or other suitable material that would be understood by a personof ordinary skill in the art. The coupling means may include: 1)adhesive, 2) welding, 3) brazing, 4) soldering, 5) mechanical linking,or other suitable means understood by a person of ordinary skill in theart. The longitudinal displacer may include a longitudinal member withan outer diameter. The tubular member has inner diameter such that theinner diameter of the tubular member is greater than the outer diameterof the longitudinal member except for a portion between the distal endof the distal aspect and the junction where the inner diameter of thetubular member is reduced to less than the outer diameter of thelongitudinal member such that longitudinal movement of the longitudinalmember toward the distal end of the tubular member imparts longitudinalforce on the distal aspect. The medical device may include a capdisposed on the distal end of the tubular member obstructing forwardmovement of the longitudinal displacer. The longitudinal displacercomprises a membrane configured to elongate when fluid is injected andlongitudinally displace the distal end of the dual chirality helix. Themedical device may include a first magnetic element disposed on thedistal aspect of the tubular member; a second magnetic element disposedon the proximal aspect of the tubular member; and a power sourceconfigured to energize at least one of the first and second magneticelements. The distal and proximal helices are comprised of at least oneof: a shape memory alloy and a shape memory polymer. The first magneticelement may be one of: a magnet, an electret, a wire, and a coilconfigured to carry current and generate a magnetic field, and thesecond magnetic element may be one of: a magnet, a ferromagneticmaterial, an electret, a wire, and a coil configured to carry currentand generate a magnetic field.

Another embodiment according to the present disclosure is a medicaldevice including: a tubular member with a longitudinal axis having adistal end and a proximal end including: a distal aspect terminating atthe distal end with a helix formed by a helical cut terminating at theproximal side of the distal aspect; and a proximal aspect terminating atthe proximal end; and a longitudinal displacer disposed within thetubular member and slidable relative to the tubular member andconfigured to impart longitudinal force on the distal helix. The distalcut width may be in a range of about 0.1 micrometers to about 30millimeters, and the distal helical cut angle may be between about 10and about 80 degrees. The tubular member may be made of one or more of:polyimide, polyurethane, polyether block amide, nylon, nickel titanium,stainless steel braiding, and hollow helical stranded tubing and whereinthe coupling means comprises at least one of: 1) adhesive, 2) welding,3) brazing, 4) soldering, and 5) mechanical linking. The longitudinaldisplacer may include a longitudinal member with an outer diameter, andthe tubular member has inner diameter such that the inner diameter ofthe tubular member is greater than the outer diameter of thelongitudinal member except for a portion between the distal end of thedistal aspect and the junction where the inner diameter of the tubularmember is reduced to less than the outer diameter of the longitudinalmember such that longitudinal movement of the longitudinal member towardthe distal end of the tubular member imparts longitudinal force on thedistal aspect. The medical device may also include a cap disposed on thedistal end of the tubular member obstructing forward movement of thelongitudinal displacer. The longitudinal displacer may include amembrane configured to elongate when fluid is injected andlongitudinally displace the distal end of the helical cut tubing. Thedistal helix may include at least one of: a shape memory alloy and ashape memory polymer; and further comprising: a first magnetic elementdisposed on one of the distal aspect and the proximal aspect of thetubular member; a second magnetic element disposed on the other of thedistal aspect and the proximal of the tubular member; and a power sourceconfigured to energize at least one of the first and second magneticelements; wherein the first magnetic element is one of: a magnet, anelectret, a wire, and a coil configured to carrying current and generatea magnetic field; and wherein the second magnetic element is one of: amagnet, a ferromagnetic material, an electret, a wire, and a coilconfigured to carrying current and generate a magnetic field.

Another embodiment according to the present disclosure is a method forcontrolling the distal end of the a medical device that includes atubular member with a longitudinal axis having a distal end and aproximal end comprising: a distal aspect terminating at the distal endwith a distal helix formed by distal helical cut terminating at theproximal side of the distal aspect; a proximal aspect terminating at theproximal end with a proximal helix formed by proximal helical cutterminating at the distal side of the proximal aspect, wherein theproximal helical cut is one of right or left handed and the distalhelical cut is the other of right and left handed; and a junction wherethe distal aspect and the proximal aspect are joined; a longitudinaldisplacer disposed within the tubular member and slidable relative tothe tubular member; and a distal segment disposed around part of thetubular member and coupled to the tubular member at the junction. Themethod includes inserting the medical device into an endoluminalstructure of a body; displaying an image of the medical device withinthe body; selecting a region of interest within the image; applyinglongitudinal force to displace the dual chirality helix causing rotationof the distal end; observing the change in position of the distal end onthe display; and adjusting the amount of longitudinal displacement isadjusted to rotate the distal end the desired degree of rotation. Thedisplay may be in form of any imaging techniques for objects internal tothe human body, including, but not limited to, x-ray fluoroscopy,ultrasound imaging, computed axial tomography (CAT) imaging, magneticresonance imaging (MRI), and/or endoscopic imaging.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube, a wire, aslidable sleeve located coaxially over the wire, a distal segment thatis coupled to the junction of the two helices of the dual chiralityhelix and a handle with controlled linear displacement. By its nature,the junction of the left and right handed helices rotates when the endsof the dual chirality helix are linearly extended or retracted,resulting in the conversion of linear movement to rotational motion ofthe junction point of the two helices. The distal segment is locatedcircumferentially around the distal aspect of the tube in which the dualchirality helix is inscribed. The distal segment is coupled to thejunction of the helices of the dual chirality helix. The tip of thedistal segment can have an angulated tip so as to aid in improvednavigation of the device. The tube has a shelf of a reduced luminalinner diameter distal to the dual chirality helix. The outer diameter ofthe sleeve is greater than the inner diameter of the shelf of the tube,but is less than the inner diameter of the tube proximal to said shelf.The sleeve slidably abuts and engages said shelf of the tube. Advancingthe sleeve results in linear displacement of the dual chirality helix.The handle with controlled linear displacement enables controlledmovement of the sleeve with respect to the long axis of the tube. Thisin turn results in rotation of the junction point of the left and righthanded helices and subsequent rotation of the distal segment. The degreeof rotation is proportional to the linear displacement of the dualchirality helix of the tube.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube, a wire with atapered distal end, a distal segment that is coupled to the junction ofthe two helices of the dual chirality helix and a handle with controlledlinear displacement. By its nature, the junction of the left and righthanded helices rotates when the ends of the dual chirality helix arelinearly extended or retracted, resulting in the conversion of linearmovement to rotational motion of the junction point of the two helices.The distal segment is located circumferentially around the distal aspectof the tube in which the dual chirality helix is inscribed. The distalsegment is coupled to the junction of the helices of the dual chiralityhelix. The tip of the distal segment can have an angulated tip so as toaid in improved navigation of the device. The tube has a shelf of areduced luminal inner diameter distal to the dual chirality helix. Thediameter of the tapered portion of the wire is less than the innerdiameter of the shelf. The outer diameter of the non-tapered portion ofthe wire is greater than the inner diameter of the shelf of the tube,but is less than the inner diameter of the tube proximal to said shelf.The non-tapered portion of the wire abuts and engages said shelf of thetube. Advancing the wire results in linear displacement of the dualchirality helix. The handle with controlled linear displacement enablescontrolled movement of the wire with respect to the long axis of thetube. This in turn results in rotation of the junction point of the leftand right handed helices and subsequent rotation of the distal segment.The degree of rotation is proportional to the linear displacement of thedual chirality helix of the tube.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube, a wire with areversibly expandable member, a distal segment that is coupled to thejunction of the two helices of the dual chirality helix and a handlewith controlled linear displacement. The wire slidably engages the lumenof the tube. A reversibly expandable member is located along the distalaspect of the wire. By its nature, the junction of the left and righthanded helices rotates when the ends of the dual chirality helix arelinearly extended or retracted, resulting in the conversion of linearmovement to rotational motion of the junction point of the two helices.The distal segment is located circumferentially around the distal end ofthe tube and is coupled to the junction of the left and right handedhelices of the dual chirality helix. The tip of the distal segment canhave an angulated tip so as better select branch vessels. With theexpandable member collapsed, the outer diameter of the wire is less thanthe inner diameter of the hypotube and thus the wire is able to freemove within the lumen of the tube. However, the outer diameter of theexpandable member in its expanded state is greater than the innerdiameter of the tube. When the reversibly expandable member is expanded,it engages the distal end of the tube. Subsequent advancement of thewire then results in linear displacement of the dual chirality helix.The handle with controlled linear displacement enables controlledmovement of the wire with respect to the long axis of the tube. This inturn results in rotation of the junction point of the left and righthanded helices and subsequent rotation of the distal segment. The degreeof rotation is proportional to the linear displacement of the dualchirality helix of the tube.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube and whereinthe distal end is capped, a wire, a distal segment that is coupled tothe junction of the two helices of the dual chirality helix and a handlewith controlled linear displacement. By its nature, the junction of theleft and right handed helices rotates when the ends of the dualchirality helix are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion of the junction pointof the two helices. The distal segment is located circumferentiallyaround the distal aspect of the tube in which the dual chirality helixis inscribed. The distal segment is coupled to the junction of thehelices of the dual chirality helix. The tip of the distal segment canhave an angulated tip so as to aid in improved navigation of the device.The outer diameter of the wire is less than the inner diameter of thetube. The distal end of the wire abuts and engages the capped distal endof the tube. Advancing the wire results in linear displacement of thedual chirality helix. The handle with controlled linear displacementenables controlled movement of the wire with respect to the long axis ofthe tube. This in turn results in rotation of the junction point of theleft and right handed helices and subsequent rotation of the distalsegment. The degree of rotation is proportional to the lineardisplacement of the dual chirality helix of the tube.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube and whereinthe distal end is capped, a liner that encompasses the dual chiralityhelix, a distal segment that is coupled to the junction of the twohelices of the dual chirality helix and a handle with controlled lineardisplacement. By its nature, the junction of the left and right handedhelices rotates when the ends of the dual chirality helix are linearlyextended or retracted, resulting in the conversion of linear movement torotational motion of the junction point of the two helices. The distalsegment is located circumferentially around the distal aspect of thetube in which the dual chirality helix is inscribed. The distal segmentis coupled to the junction of the helices of the dual chirality helix.The tip of the distal segment can have an angulated tip so as to aid inimproved navigation of the device. Injecting fluid into the lumen of thetube results in varying degrees of linear displacement of the dualchirality helix. This in turn results in rotation of the junction pointof the left and right handed helices and subsequent rotation of thedistal segment. The degree of rotation is proportional to the lineardisplacement of the dual chirality helix of the tube.

A handle can be applied to the proximal end of the sleeve or wire andthe proximal end of the tube in order to provide more precise movementof the sleeve or wire with respect to elongated tube. This handle can becomprised of two coaxial tubes that capable of displacement with respectto one another along the long axis of the tubes. Means for translationalmotion with respect to one another include but are not limited to 1)manual displacement of the two coaxial tubes along the long axis of thetubes; 2) threaded portions of each tubes that are coaxially receivablesuch that rotation of the tubes along the threaded portions results inlinear displacement of the tubes with respect to one another (similarmechanism to the linear movement of screwing a bolt into a nut.) Thehandle is able to coaxially receive the inner wire and elongated tubewithin the lumen of the gripper device. Fastening mechanisms can belocated along each end of the handle so as to grip the sleeve or wire atone end and the tube at the other end. These fastening mechanisms can bepermanently or reversibly fixed in place. These fastening mechanisms canalso swivel about the sleeve or wire or elongated tube such the sleeve,wire or elongated tube do not undergo rotational motion while one ormore of the coaxial tubes are being rotated.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube and whereinsaid elongated tube is comprised of material capable of undergoing ashape transformation in response to a change in the surroundingenvironment, a distal segment that is coupled to the junction of the twohelices of the dual chirality helix, a means for causing the tube toundergo shape transformation and a means for counteracting the shapetransformation of the tube. By its nature, the junction of the left andright handed helices rotates when the ends of the dual chirality helixare linearly extended or retracted, resulting in the conversion oflinear movement to rotational motion of the junction point of the twohelices. The distal segment is located circumferentially around thedistal end of the tube and is coupled to the junction of the left andright handed helices of the dual chirality helix. The tip of the distalsegment can have an angulated tip so as better select branch vessels.Alterations in environment including but not limited to temperature,electric field, pH, light, ion concentration result in shapetransformation of the tube such that there is linear displacement of thedual chirality helix. This in turn results in rotation of the junctionpoint of the left and right handed helices and subsequent rotation ofthe distal segment. The degree of rotation is proportional to the lineardisplacement of the dual chirality helix of the tube. A means forcounteracting the shape transformation of the tube, including but notlimited to coupling the conduit to the distal end of the tube. Varyingamounts of tension can be applied to the conduit in order to counteractthe linear displacement of the dual chirality helix.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end wherein a dualchirality helix is cut into the distal aspect of the tube, a distalsegment that is coupled to the junction of the two helices of the dualchirality helix, a means for linear displacement of the tube containingdual chirality cut wherein said means includes but is not limited torepulsion of electrical fields or repulsion of magnetic fields. By itsnature, the junction of the left and right handed helices rotates whenthe ends of the dual chirality helix are linearly extended or retracted,resulting in the conversion of linear movement to rotational motion ofthe junction point of the two helices. The distal segment is locatedcircumferentially around the distal end of the tube and is coupled tothe junction of the left and right handed helices of the dual chiralityhelix. The tip of the distal segment can have an angulated tip so asbetter select branch vessels. Examples of means for applying opposingelectrical or magnetic fields along or proximate to the region of thedual chirality helix include but are not limited to 1) applying apermanent electrical or magnetic charge on one end of the dual chiralityhelix and a variable, inducible charge on the opposite end of the dualchirality helix; 2) applying an inducible electrical or magnetic chargeon one end of the dual chirality helix and a variable, inducibleelectrical or magnetic charge on the opposite end of the dual chiralityhelix; 3) applying an electrical or magnetic charge on one end of thedual chirality helix cut and an electrical or magnetic charge on aportion of guidewire proximate to the dual chirality helix. The opposingelectrical or magnetic forces results in linear displacement of the dualchirality helix. This in turn results in rotation of the junction pointof the left and right handed helices and subsequent rotation of thedistal segment. The degree of rotation is proportional to the lineardisplacement of the dual chirality helix of the tube.

Another embodiment according to the present disclosure is a deviceincluding a tube with a distal end and a proximal end, a wire with twoor more outer diameters, and a means for advancing the wire. A dualchirality helix is cut into the tube just proximal to the reducedluminal inner diameter of the tube. By its nature, the junction of theleft and right handed helices rotates when the ends of the dualchirality helix are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion of the junction pointof the two helices. A means for engaging the wire, including but notlimited to a tooth, is present on the junction point of the left andright handed helices. One or more grooves are located along thelongitudinal axis of the wire along the tapered portion of the wire andthe grooves extend slightly proximal to the transition the diameter ofthe wire. The tooth slidably engages one or more grooves along thedistal aspect of the inner wire. The diameter of the distal aspect ofthe wire is less than the proximal diameter. The luminal inner diameterof the distal end of the tube is greater than the diameter of the distalaspect of the wire and less than the diameter of the proximal aspect ofthe wire. Advancing the wire into the tube results in lineardisplacement of the dual chirality helix. This in turn results inrotation of the junction point of the left and right handed helices andsubsequent rotation of the distal aspect of the wire. The degree ofrotation is proportional to the linear displacement of the dualchirality helix of the tube.

Another embodiment according to the present disclosure includes amedical device comprising: an outer sheath, a tube with a distal end anda proximal end wherein one or more helical or spiral cut(s) are impartedinto the distal aspect of tube, and a slidable sleeve that is locatedwithin the lumen of the tube. By its nature, the portion of the tubethat is distal to the helical or spiral cut(s) rotates when the helicalor spiral cut(s) are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion. The distal end ofthe helical/spiral cut tube can have an angulated tip so as to aid inimproved navigation of the device. The tube can have a shelf of areduced luminal inner diameter distal to the helical or spiral cut. Theouter diameter of the sleeve is greater than the inner diameter of theshelf of the tube, but is less than the inner diameter of the tubeproximal to said shelf. The sleeve slidably abuts and engages said shelfof the tube. Advancing the sleeve results in linear displacement of thecut portion of the tube. Alternatively, the sleeve can be coupled to thetube distal to the helical or spiral cut(s) by means including but notlimited to: adhesives, soldering, welding, brazing and/or mechanicallinkage. A handle with controlled linear displacement enables controlledmovement of the sleeve with respect to the long axis of the tube. Thisin turn results in rotation of the distal end of the tube. The degree ofrotation is proportional to the linear displacement of the helical orspiral cut portion of the tube. The tube is located within the lumen ofthe outer sheath such that the helical or spiral cut portion of the tubeis disposed within the lumen of the outer sheath while the distal end ofthe tube can extend beyond the outer sheath (e.g., the total length ofthe tube is greater than the total length of the outer sheath, while thelength from the proximal end of the tube to the distal most aspect ofthe cut portion of the tube is less than the total length of the outersheath). The tube and slidable sleeve can be removed from the outersheath such that the outer sheath may serve as a conduit for delivery ofdiagnostic and/or therapeutic agent(s) including but not limited toinjection of contrast agent(s), medication(s), stents, embolic agents.

Another embodiment according to the present disclosure includes amedical device comprising: a tube with a distal end and a proximal endwherein one or more helical or spiral cut(s) are imparted into thedistal aspect of tube, an outer layer around the tube, a slidable sleevethat is located within the lumen of the tube. By its nature, the portionof the tube that is distal to the helical or spiral cut(s) rotates whenthe helical or spiral cut(s) are linearly extended or retracted,resulting in the conversion of linear movement to rotational motion. Thedistal end of the helical/spiral cut tube can have an angulated tip soas to aid in improved navigation of the device. The tube can have ashelf of a reduced luminal inner diameter distal to the helical orspiral cut. The outer diameter of the sleeve is greater than the innerdiameter of the shelf of the tube, but is less than the inner diameterof the tube proximal to said shelf. The sleeve slidably abuts andengages said shelf of the tube. Advancing the sleeve results in lineardisplacement of the cut portion of the tube. Alternatively, the sleevecan be coupled to the tube distal to the helical or spiral cut(s) bymeans including but not limited to: adhesives, soldering, welding,brazing and/or mechanical linkage. A handle with controlled lineardisplacement enables controlled movement of the sleeve with respect tothe long axis of the tube. This in turn results in rotation of thedistal end of the tube. The degree of rotation is proportional to thelinear displacement of the helical or spiral cut portion of the tube.Around the outside of the tube is an outer layer that is coupled to theproximal and distal aspects of the tube. The outer layer is able toelongate as the tube undergoes linear displacement (elongation). Theslidable sleeve can be removed from the tube may serve as a conduit fordelivery of diagnostic and/or therapeutic agent(s) including but notlimited to injection of contrast agent(s), medication(s), stents,embolic agents.

Another embodiment according to the present disclosure includes amedical device comprising: 1) a tube with a distal end and a proximalend wherein one or more helical or spiral cut(s) are imparted into thedistal aspect of tube 2) a tubular member located coaxially around thehelical or spiral cut tube and a 3) handle assembly. The distal end ofthe tubular member can be coupled to the tube distal to the helical orspiral cut(s) by means including but not limited to: adhesives,soldering, welding, brazing and/or mechanical linkage. The tubularmember can be comprised of one or more elements including but notlimited to: 1) coiled wire, 2) polymer, 3) hypotube. By its nature, theportion of the tube that is distal to the helical or spiral cut(s)rotates when the helical or spiral cut(s) are linearly extended orretracted, resulting in the conversion of linear motion to rotationalmotion. The distal aspect of the tubular member is able to undergotorsion strain when the distal end of the helical or spiral cut tuberotates. The distal end of the helical or spiral cut tube can havemultiple configurations including but not limited to: 1) an angulatedtip so as to aid in improved navigation of the device, 2) a beveled edgeso as to aid in advancing the device past a severe stenosis orocclusion, 3) one or more flutes/grooves so as to aid in advancing thedevice past a severe stenosis or occlusion or advancing the device alonga tortuous path, 4) one or more radio-opaque markers. The handleassembly is comprised of a proximal component and a distal component.

Another embodiment according to the present disclosure includes amedical device comprising: 1) a tube with a distal end and a proximalend wherein one or more helical or spiral cut(s) are imparted into thedistal aspect of tube and 2) a tubular member located coaxially aroundthe helical or spiral cut tube, wherein the outer diameter of thehelical or spiral cut tube distal to the cut increase such that it isgreater than the inner diameter of the tubular member. (Note the outerdiameter of the helical or spiral cut tube from the proximal end to thehelical or spiral cut is less than the inner diameter of the helical orspiral cut tube.) The tubular member can be comprised of one or moreelements including but not limited to: 1) coiled wire, 2) polymer, 3)hypotube. Advancing the tubular member with respect to the helical orspiral cut tube results in elongation of the helical or spiral cut. Byits nature, the portion of the tube that is distal to the helical orspiral cut(s) rotates when the helical or spiral cut(s) are linearlyextended or retracted, resulting in the conversion of linear motion torotational motion. The distal end of the tubular member and the distalend of the tube are able to rotate with respect to one another. Thedistal end of the helical or spiral cut tube can have multipleconfigurations including but not limited to: 1) an angulated tip so asto aid in improved navigation of the device, 2) a beveled edge so as toaid in advancing the device past a severe stenosis or occlusion, 3) oneor more flutes/grooves so as to aid in advancing the device past asevere stenosis or occlusion or advancing the device along a tortuouspath, 4) one or more radio-opaque markers.

Another embodiment according to the present disclosure includes amedical device comprising: 1) a tube with a distal end and a proximalend wherein one or more helical or spiral cut(s) are imparted into thedistal aspect of tube, 2) a wire that is coupled to the proximal end ofthe helical or spiral cut tube and 3) a tubular member located coaxiallyaround the helical or spiral cut tube. The distal end of the wire can becoupled to the proximal end of the helical or spiral cut tube by meansincluding but not limited to: adhesives, soldering, welding, brazingand/or mechanical linkage. Also, the distal end of the tubular membercan be coupled to the helical or spiral cut tube distal to the helicalor spiral cut(s) by means including but not limited to: adhesives,soldering, welding, brazing and/or mechanical linkage. The tubularmember can be comprised of one or more elements including but notlimited to: 1) coiled wire, 2) polymer, 3) hypotube. By its nature, theportion of the tube that is distal to the helical or spiral cut(s)rotates when the helical or spiral cut(s) are linearly extended orretracted, resulting in the conversion of linear motion to rotationalmotion. The distal aspect of the tubular member is able to undergotorsion strain when the distal end of the helical or spiral cut tuberotates. The distal end of the helical or spiral cut tube can havemultiple configurations including but not limited to: 1) an angulatedtip so as to aid in improved navigation of the device, 2) a beveled edgeso as to aid in advancing the device past a severe stenosis orocclusion, 3) one or more flutes/grooves so as to aid in advancing thedevice past a severe stenosis or occlusion or advancing the device alonga tortuous path, 4) one or more radio-opaque markers.

Another embodiment according to the present disclosure includes amedical device comprising: 1) a tube with a distal end and a proximalend wherein one or more helical or spiral cut(s) are imparted into thedistal aspect of tube, 2) a distendable layer that is locatedcircumferentially around the helical or spiral cut tube, wherein theproximal and distal ends of the are coupled to the helical or spiral cuttube just proximal and just distal to helical or spiral cut(s), 3) atubular member located within the lumen of the helical or spiral cuttube and a handle assembly. The distendable layer can be coupled to thehelical or spiral cut tube by means including but not limited to:adhesives, soldering, welding, brazing and/or mechanical linkage. Also,the distal end of the tubular member can be coupled to the helical orspiral cut tube distal to the helical or spiral cut(s) by meansincluding but not limited to: adhesives, soldering, welding, brazingand/or mechanical linkage. The tubular member can be comprised of one ormore elements including but not limited to: 1) coiled wire, 2) polymerwith or without reinforcement (braiding or coil reinforcement forexample), 3) hypotube. By its nature, the portion of the tube that isdistal to the helical or spiral cut(s) rotates when the helical orspiral cut(s) are linearly extended or retracted, resulting in theconversion of linear motion to rotational motion. The distal aspect ofthe tubular member is able to undergo torsion strain when the distal endof the helical or spiral cut tube rotates. The distal end of the helicalor spiral cut tube can have multiple configurations including but notlimited to: 1) an angulated tip so as to aid in improved navigation ofthe device, 2) a beveled edge so as to aid in advancing the device pasta severe stenosis or occlusion, 3) one or more flutes/grooves so as toaid in advancing the device past a severe stenosis or occlusion oradvancing the device along a tortuous path, 4) one or more radio-opaquemarkers.

A handle assembly can be applied to the proximal end of the tube or wireand the proximal end of the outer tubular member in order to providemore precise movement of the tube or wire with respect to outer tubularmember. This handle can comprise two coaxial components that capable ofdisplacement with respect to one another along the long axis of thecomponents. Means for translational motion with respect to one anotherinclude but are not limited to 1) manual displacement of the two coaxialtubes along the long axis of the tubes; 2) threaded portions of eachtubes that are coaxially receivable such that rotation of the tubesalong the threaded portions results in linear displacement of the tubeswith respect to one another (similar mechanism to the linear movement ofscrewing a bolt into a nut.) The handle assembly is able to coaxiallyreceive the proximal end of the tube or wire and the outer tubularmember. Fastening mechanisms can be located along both the proximalhandle component and the distal handle component so as to grip theproximal end of the tube or wire and the proximal end of the outertubular member. These fastening mechanisms can be permanently orreversibly fixed in place. These fastening mechanisms can also swivelabout the proximal end of the tube or wire and the proximal end of theouter tubular member such the tube or wire and outer tubular member donot undergo rotational motion while one or more of the coaxialcomponents are being rotated.

Another embodiment according to the present disclosure is a medicaldevice including: a tubular member with a longitudinal axis having adistal end and a proximal end including: a distal aspect terminating atthe distal end with a helix formed by a partial thickness helical cutterminating at the proximal side of the distal aspect; and a proximalaspect terminating at the proximal end; and a longitudinal displacerdisposed within the tubular member and slidable relative to the tubularmember and configured to impart longitudinal force on the distal helix.The partial thickness cut portion is elastic and can undergo elongation.The distal cut width may be in a range of about 0.1 micrometers to about30 millimeters, and the distal helical cut angle may be between about 10and about 80 degrees. The tubular member may be made of one or more of:polyimide, polyurethane, polyether block amide, nylon, nickel titanium,stainless steel braiding, and hollow helical stranded tubing and whereinthe coupling means comprises at least one of: 1) adhesive, 2) welding,3) brazing, 4) soldering, and 5) mechanical linking. The longitudinaldisplacer may include a longitudinal member with an outer diameter, andthe tubular member has inner diameter such that the inner diameter ofthe tubular member is greater than the outer diameter of thelongitudinal member except for a portion between the distal end of thedistal aspect and the junction where the inner diameter of the tubularmember is reduced to less than the outer diameter of the longitudinalmember such that longitudinal movement of the longitudinal member towardthe distal end of the tubular member imparts longitudinal force on thedistal aspect. The medical device may also include a cap disposed on thedistal end of the tubular member obstructing forward movement of thelongitudinal displacer. The longitudinal displacer may include amembrane configured to elongate when fluid is injected andlongitudinally displace the distal end of the helical cut tubing. Thedistal helix may include at least one of: a shape memory alloy and ashape memory polymer; and further comprising: a first magnetic elementdisposed on one of the distal aspect and the proximal aspect of thetubular member; a second magnetic element disposed on the other of thedistal aspect and the proximal of the tubular member; and a power sourceconfigured to energize at least one of the first and second magneticelements; wherein the first magnetic element is one of: a magnet, anelectret, a wire, and a coil configured to carrying current and generatea magnetic field; and wherein the second magnetic element is one of: amagnet, a ferromagnetic material, an electret, a wire, and a coilconfigured to carrying current and generate a magnetic field.

Another embodiment according to the present disclosure includes amedical device comprising: an outer sheath, a tube with a distal end anda proximal end wherein one or more helical or spiral cut(s) are impartedinto the distal aspect of tube. By its nature, the portion of the tubethat is distal to the helical or spiral cut(s) rotates when the helicalor spiral cut(s) are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion. The distal end ofthe helical/spiral cut tube can have a deflectable distal end so as toaid in improved navigation of the device. Means for deflecting thedistal end of the tube include but are not limited to: pull wire(s),slotted tube, shape memory alloys and/or shape memory polymers. The tubeis located within the lumen of the outer sheath such that the helical orspiral cut portion of the tube is disposed within the lumen of the outersheath while the distal end of the tube can extend beyond the outersheath (e.g., the total length of the tube is greater than the totallength of the outer sheath, while the length from the proximal end ofthe tube to the distal most aspect of the cut portion of the tube isless than the total length of the outer sheath). When the distal end ofthe tube is deflected, the distal end of the outer sheath slidably abutsand engages the deflected distal end of the tube. Advancing the outersheath relative to the tube results in linear displacement (e.g.,elongation) of the cut portion of the tube. A handle with controlledlinear displacement enables controlled movement of the outer sheath withrespect to the long axis of the tube. This in turn results in rotationof the distal end of the tube. The degree of rotation is proportional tothe linear displacement of the helical or spiral cut portion of thetube. When the tube is not deflected (e.g., the distal end the of thetube is straight), the tube can be removed from the outer sheath suchthat the outer sheath may serve as a conduit for delivery of diagnosticand/or therapeutic agent(s) including but not limited to injection ofcontrast agent(s), medication(s), stents, embolic agents.

Another embodiment according to the present disclosure includes amedical device comprising: an outer sheath, a tube with a distal end anda proximal end wherein one or more helical or spiral cut(s) are impartedinto the distal aspect of tube, a slidable sleeve that is located withinthe lumen of the tube. By its nature, the portion of the tube that isdistal to the helical or spiral cut(s) rotates when the helical orspiral cut(s) are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion. The tube is locatedwithin the lumen of the outer sheath such that the helical or spiral cutportion of the tube is disposed within the lumen of the outer sheathwhile the distal end of the tube can extend beyond the outer sheath(e.g., the total length of the tube is greater than the total length ofthe outer sheath, while the length from the proximal end of the tube tothe distal most aspect of the cut portion of the tube is less than thetotal length of the outer sheath). The tube distal to the spiral cutportion of the tube can have a curved portion so as to aid in improvednavigation of the device, wherein said curved portion has a lowermodulus of rigidity (e.g., is more flexible) than the modulus ofelasticity of the distal aspect of the outer sheath. As either the outersheath is advanced distally over the curved portion of the tube or asthe curved portion of the tube is retracted back into the outer sheath,the curved portion of the tube straightens. The degree in which thecurved portion of the tube straightens is related to the amount of thecurved portion of the tube that is disposed in the lumen of the outersheath. When the curved portion of the tube is completely disposed inthe lumen of the outer sheath, the curved portion of the tube is fullystraightened (e.g., tip deflection angle is approximately 0 degreesrelative to the longitudinal axis of the device). This can enable theuser to selectively deflect the tip of the device. The tube can have ashelf of a reduced luminal inner diameter distal to the helical orspiral cut. The outer diameter of the sleeve is greater than the innerdiameter of the shelf of the tube, but is less than the inner diameterof the tube proximal to said shelf. The sleeve slidably abuts andengages said shelf of the tube. Advancing the sleeve results in lineardisplacement of the cut portion of the tube. Alternatively, the sleevecan be coupled to the tube distal to the helical or spiral cut(s) bymeans including but not limited to: adhesives, soldering, welding,brazing and/or mechanical linkage. A handle with controlled lineardisplacement enables controlled movement of the sleeve with respect tothe long axis of the tube. This in turn results in rotation of thedistal end of the tube. The degree of rotation is proportional to thelinear displacement of the helical or spiral cut portion of the tube.The tube and slidable sleeve can be removed from the tube may serve as aconduit for delivery of diagnostic and/or therapeutic agent(s) includingbut not limited to injection of contrast agent(s), medication(s),stents, embolic agents.

BRIEF DESCRIPTION OF THE DRAWINGS

For a detailed understanding of the present disclosure, reference shouldbe made to the following detailed description of the embodiments, takenin conjunction with the accompanying drawings, in which like elementshave been given like numerals, wherein:

FIG. 1 is a diagram of a medical system including a medical deviceaccording to one embodiment of the disclosure;

FIG. 2A is a diagram of a distal end of the medical device in anoriginal orientation and disposed in branching segment of an endoluminalstructure within the body prior to selection of a desired endoluminalstructure;

FIG. 2B is a diagram of the distal end of the medical device afterselection of a branch within the branching endoluminal structure withinthe body;

FIG. 3A is a diagram of the dual chirality helical cut into the tubewith force vectors showing rotational forces during linear displacementof the distal end of the tube according to one embodiment of the presentdisclosure;

FIG. 3B is a free body diagram of the forces in FIG. 3A;

FIG. 4A is a cross sectional view along the long axis of a tube with adual chirality helical cut without linear displacement of the distal endof the tube according to one embodiment of the present disclosure;

FIG. 4B is a cross sectional view along the long axis of the tube ofFIG. 4A with linear displacement of the distal end of the tube;

FIG. 4C is cross sectional view along the long axis of the tube of FIG.4A with additional linear displacement of the distal end of the tube;

FIG. 5 is a flowchart of a method of imparting rotational motion to thedistal end of the device by means of conversion of linear displacementto rotational motion via a dual chirality mechanism;

FIG. 6A is a diagram of the proximal end of the medical device accordingto one embodiment of the present disclosure;

FIG. 6B is a diagram of the distal end of the medical device accordingto one embodiment of the present disclosure;

FIG. 7A is a longitudinal cross sectional view of the distal aspect ofthe device with an open distal end in its resting state according to oneembodiment of the present disclosure;

FIG. 7B is a longitudinal cross sectional view of the distal aspect ofthe device with an open distal end of FIG. 7A with linear displacementof the dual chirality helix via the sleeve abutting the shelf;

FIG. 8A is a longitudinal cross sectional view of the distal aspect ofthe device with an open distal end in its resting state, with aninterior shelf and wire according to one embodiment of the presentdisclosure;

FIG. 8B is a longitudinal cross sectional view of the distal aspect ofthe device with an open distal end of FIG. 8A with linear displacementof the dual chirality helix via the nonreduced diameter of the wireabutting the shelf;

FIG. 9A is a longitudinal cross sectional view of the distal aspect ofthe device with an open distal end in its resting state with a wire withan expandable member;

FIG. 9B is a longitudinal cross sectional view of the distal aspect ofthe device with an open distal end of FIG. 9A with linear displacementof the dual chirality helix via the expanded member of the wire abuttingthe distal end of the dual chirality helix;

FIG. 10A is a longitudinal cross sectional view of the distal aspect ofthe medical device with a capped distal end in its resting state;

FIG. 10B is a longitudinal cross sectional view of the distal aspect ofthe medical device with a capped distal end of FIG. 10A with lineardisplacement of the dual chirality helix via the wire abutting thecapped end;

FIG. 11A is a longitudinal cross sectional view of the distal aspect ofthe device with a capped distal end in its resting state configured toreceive an injection of fluid into the lumen of the tube;

FIG. 11B is an enlarged longitudinal cross sectional view of the distalaspect of the device with a capped distal end of FIG. 11A with lineardisplacement of the dual chirality helix via the injection of fluid intothe lumen of the tube;

FIG. 12A is a longitudinal cross sectional view of the handle withcontrolled linear displacement in an open state;

FIG. 12B is a transverse cross sectional view of the handle withcontrolled linear displacement through A-A′ in FIG. 12A.

FIG. 13 is a longitudinal cross sectional view of the handle withcontrolled linear displacement in a closed state;

FIG. 14A is a longitudinal cross sectional view of the handle withcontrolled linear displacement in an open state;

FIG. 14B is a transverse cross sectional view of the handle withcontrolled linear displacement through B-B′ in FIG. 14A;

FIG. 14C is a transverse cross sectional view of the handle withcontrolled linear displacement through C-C′ in FIG. 14A;

FIG. 15A is a longitudinal cross sectional view of the handle withcontrolled linear displacement in a closed state;

FIG. 15B is a transverse cross sectional view of the handle withcontrolled linear displacement through B-B′ in FIG. 15A.

FIG. 15C is a transverse cross sectional view of the handle withcontrolled linear displacement through C-C′ in FIG. 15A.

FIG. 16 is a diagram of a second embodiment of the medical devicewherein the dual chirality helix is displaced via the tube undergoing ashape transformation in response to a change in the surroundingenvironment;

FIG. 17A is a longitudinal cross sectional view of the distal aspect ofthe device in its resting state according to another embodiment of thepresent disclosure;

FIG. 17B is a longitudinal cross sectional view of the distal aspect ofthe medical device of FIG. 17A with linear displacement of the dualchirality helix secondary to shape transformation of the tube;

FIG. 18 is a diagram of another embodiment of the medical device whereinthe dual chirality helix is displaced via magnetic forces;

FIG. 19A is a longitudinal cross sectional view of the distal aspect ofthe medical device with a magnetic displacement mechanism in its restingstate;

FIG. 19B is a longitudinal cross sectional view of the distal aspect ofthe medical device with the magnetic displacement mechanism of FIG. 19Awith linear displacement of the dual chirality helix secondary magneticforces imparted on the tube;

FIG. 20A is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the medical device with a magnetic displacementmechanism in its resting state where one of the magnetic forces isprovided via shaft with a magnetic element;

FIG. 20B is a longitudinal cross sectional view of the distal aspect ofthe medical device with the magnetic displacement mechanism of FIG. 20Awith linear displacement of the dual chirality helix secondary magneticforces imparted on the tube via shaft with a magnetic element;

FIG. 21A is a longitudinal cross sectional view of the distal aspect ofthe medical device with a tooth-gear interface between a guidewire andthe tube with no force applied to the distal end of the dual chiralityhelix;

FIG. 21B is a transverse cross sectional view of the distal aspect ofthe medical device in FIG. 21A through B-B′ with no force applied to thedistal end of the dual chirality helix;

FIG. 21C is a transverse cross sectional view of the distal aspect ofthe medical device in FIG. 21A through C-C′ with no force applied to thedistal end of the dual chirality helix;

FIG. 22A is a longitudinal cross sectional view of the distal aspect ofthe guidewire at the level of the tooth-gear interface when the dualchirality helix undergoes longitudinal displacement;

FIG. 22B is a longitudinal cross sectional view of the distal aspect ofthe guidewire at the level of the tooth-gear interface when the dualchirality helix undergoes longitudinal displacement;

FIG. 23A is a diagram of a catheter with a single helix formed from atube according to one embodiment of the present disclosure;

FIG. 23B is a cross-sectional view of FIG. 23A;

FIG. 23C is a transverse cross section of FIG. 23A through lines C-C′;

FIG. 23D is a transverse cross section of FIG. 23A through lines D-D′;

FIG. 23E is a transverse cross section of FIG. 23A through lines E-E′;

FIG. 23F is a diagram of a handle connected to the catheter of FIG. 23A;

FIG. 24A is a diagram of the catheter of FIG. 23A at rest (nolongitudinal force) with a distal member;

FIG. 24B is a diagram of the catheter of FIG. 23A with longitudinalforce at the proximal end causing a rotation of the distal end by 90degrees;

FIG. 24C is a diagram of the catheter of FIG. 23A with longitudinalforce at the proximal end causing a rotation of the distal end by 180degrees;

FIG. 24D is a diagram of the catheter of FIG. 23A with longitudinalforce at the proximal end causing a rotation of the distal end by 270degrees;

FIG. 25A is a diagram of the catheter of FIG. 23A while in its restingstate (0 degrees of rotation);

FIG. 25B is a diagram of the catheter of FIG. 23A when the sleeve isretracted to reverse the rotation of the distal end to −90 degrees;

FIGS. 26A and 26B schematically illustrate a chronic total occlusioncrossing device embodiment of the distal segment;

FIGS. 27A and 27B illustrate an endoscope embodiment of the distalsegment;

FIG. 28 is a diagram of an endoscopic grasping tool embodiment of thedistal segment;

FIG. 29 is a diagram of an endoscopic cauterizing tool embodiment of thedistal segment.

FIG. 30A is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the medical device wherein the sleeve and the tubehas a shelf within its lumen distal to the helical cut;

FIG. 30B is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the medical device wherein the sleeve displacesthe shelf resulting in a 180 degree rotation relative to FIG. 30A;

FIG. 30C is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the medical device wherein the sleeve as shown inFIG. 30A has been replaced by a liner resulting greater luminal diameterof the device;

FIG. 31A is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device in its resting state with a sleeve withan expandable member;

FIG. 31B is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device wherein there is longitudinaldisplacement of the distal end of the tube by advancement of the sleeve;

FIG. 31C is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device wherein the expandable member of thesleeve has been collapsed by a straightening element;

FIG. 32A is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device in its resting state wherein the sleeveis coupled to the tube distal to the helical cut;

FIG. 32B is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device wherein there is longitudinaldisplacement of the distal end of the tube by advancement of the sleeve;

FIG. 32C is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device wherein the coupling has been removed;

FIG. 33A illustrates a diagram of a medical device for converting linearmotion to rotational motion along the distal aspect of the device thatcomprises an outer sheath, tube with one or more helical or spiral cutsand a slidable sleeve disposed within the lumen of said tube accordingto one embodiment of the present disclosure;

FIG. 33B illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 33A while in its resting state (e.g., 0degrees of rotation), according to one embodiment;

FIG. 33C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 33A with longitudinal force at the proximalend causing a rotation of the distal end by 180 degrees, according toone embodiment;

FIG. 33D illustrates a transverse cross section of FIG. 33B throughlines 33D-33D′;

FIG. 33E illustrates a transverse cross section of FIG. 33B throughlines 33E-33E′;

FIG. 33F illustrates a transverse cross section of FIG. 33B throughlines 33F-33F′;

FIG. 34A illustrates a longitudinal cross-sectional view of a medicaldevice for converting linear motion to rotational motion along thedistal aspect of the device that comprises a tube with one or morehelical or spiral cuts, a slidable sleeve disposed within the lumen ofsaid tube and an outer layer disposed around said tube according toanother embodiment of the present disclosure;

FIG. 34B illustrates a transverse cross sectional view of FIG. 34Athrough lines 34B-34B′;

FIG. 35A schematically illustrates one embodiment of a medical devicefor converting linear motion to rotational motion along the distalaspect of the device;

FIG. 35B is a detailed view of the distal aspect of the device of FIG.35A;

FIG. 35C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 35A with longitudinal force at the proximalend causing a rotation of the distal end;

FIG. 35D illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 35A while in its resting state (e.g., 0degrees of rotation);

FIG. 35E illustrates a transverse cross section of FIG. 35D throughlines 35E-35E′;

FIG. 35F illustrates a transverse cross section of FIG. 35D throughlines 35F-35F′;

FIG. 35G illustrates a transverse cross section of FIG. 35D throughlines 35G-35G′;

FIG. 35H illustrates a transverse cross section of FIG. 35D throughlines 35H-35H′;

FIG. 36A illustrates one embodiment of a medical device for convertinglinear motion to rotational motion along the distal aspect of thedevice;

FIG. 36B illustrates a detailed view of the distal aspect of the deviceof FIG. 36A;

FIG. 36C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 36A with longitudinal force at the proximalend causing a rotation of the distal end by 180 degrees;

FIG. 36D illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 36A while in its resting state (0 degrees ofrotation);

FIG. 36E illustrates a transverse cross section of FIG. 36D throughlines 36E-36E′;

FIG. 36F illustrates a transverse cross section of FIG. 36D throughlines 36F-36F′;

FIG. 36G illustrates a transverse cross section of FIG. 36D throughlines 36G-36G′;

FIG. 37A illustrates one embodiment of a medical device for convertinglinear motion to rotational motion along the distal aspect of thedevice;

FIG. 37B illustrates a detailed view of the distal aspect of the deviceof FIG. 37A;

FIG. 37C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 37A with longitudinal force at the proximalend causing a rotation of the distal end by 180 degrees;

FIG. 37D illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 37A while in its resting state (0 degrees ofrotation);

FIG. 37E illustrates a transverse cross section of FIG. 37D throughlines 37E-37E′;

FIG. 37F illustrates a transverse cross section of FIG. 37D throughlines 37F-37F′;

FIG. 37G illustrates a transverse cross section of FIG. 37D throughlines 37G-37G′;

FIG. 38A illustrates a longitudinal cross-sectional view of anotherembodiment of a medical device configured to convert linear motion torotational motion along the distal aspect of the device;

FIG. 38B illustrates a transverse cross section of FIG. 38A throughlines 38B-38B′;

FIG. 38C illustrates a longitudinal cross-sectional view of oneembodiment of a medical device for converting linear motion torotational motion along the distal aspect of the device;

FIG. 38D illustrates a transverse cross section of FIG. 38C throughlines 38C-38C′;

FIG. 39 illustrates a longitudinal cross-sectional view of anotherembodiment of a medical device configured to convert linear motion torotational motion along the distal aspect of the device;

FIG. 40 illustrates a longitudinal cross-sectional view of anotherembodiment of a medical device configured to convert linear motion torotational motion along the distal aspect of the device;

FIG. 41A illustrates a longitudinal cross-sectional view of anotherembodiment of an medical device comprising a single helix;

FIG. 41B illustrates a transverse cross sectional view of the device ofFIG. 41A along lines B-B′;

FIG. 41C illustrates a transverse cross sectional view of the device ofFIG. 41A through lines C-C′;

FIG. 41D illustrates a transverse cross sectional view of the device ofFIG. 41A through lines D-D′;

FIG. 42A schematically illustrates another embodiment of a medicaldevice configured to convert linear motion to rotational motion alongthe distal aspect of the device;

FIG. 42B illustrates a longitudinal cross-sectional view of the distalend of the device of FIG.42A in a first orientation;

FIG. 42C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 42A in a second orientation;

FIG. 42D illustrates a transverse cross sectional view of the device ofFIG. 42B through lines D-D′;

FIG. 42E illustrates a transverse cross sectional view of the device ofFIG. 42B through lines E-E′;

FIG. 43A schematically illustrates another embodiment of a medicaldevice configured to convert linear motion to rotational motion alongthe distal aspect of the device;

FIG. 43B illustrates a longitudinal cross-sectional view of the distalend of the device of FIG. 43A with the distal end of the tube in a firstorientation;

FIG. 43C illustrates a longitudinal cross-sectional view of the distalend of the device of FIG. 43A with the distal end of the tube in asecond orientation;

FIG. 43D illustrates a transverse cross sectional view of the device ofFIG. 43B through lines D-D′;

FIG. 43E illustrates a transverse cross sectional view of the device ofFIG. 43B through lines E-E′;

FIG. 44A schematically illustrates another embodiment of a medicaldevice configured to convert linear motion to rotational motion alongthe distal aspect of the device;

FIG. 44B illustrates a longitudinal cross-sectional view of the distalend of the device of FIG. 44A wherein the outer sheath is not engagingthe curved portion of the tube resulting in 180 degree curvature ofdistal aspect of the tube;

FIG. 44C illustrates a longitudinal cross-sectional view of the distalend of the device of FIG. 44A wherein the outer sheath is partiallyengages the curved portion of the tube resulting in 90 degree curvatureof distal aspect of the tube;

FIG. 44D illustrates a longitudinal cross-sectional view of the distalend of the device of FIG. 3A wherein the outer sheath further engagesthe curved portion of the tube resulting in 45 degree curvature ofdistal aspect of the tube;

FIG. 44E illustrates a longitudinal cross-sectional view of the distalend of the device of FIG. 44A wherein the outer sheath fully engages thecurved portion of the tube resulting in straightening (0 degreecurvature) of distal aspect of the tube;

FIG. 44F illustrates a transverse cross sectional view of the device ofFIG. 44E through lines F-F′;

FIG. 44G illustrates a transverse cross sectional view of the device ofFIG. 44E through lines G-G′;

The figures are drawn for ease of explanation of the basic teachings ofthe present disclosure only; the extensions of the figures with respectto number, position, relationship, and dimensions of the parts to formthe preferred embodiment will be explained or will be within the skillof the art after the following teachings of the present disclosure havebeen read and understood. Further, the exact dimensions and dimensionalproportions to conform to specific force, weight, strength, and similarrequirements will likewise be within the skill of the art after thefollowing teachings of the present disclosures have been read andunderstood.

DETAILED DESCRIPTION

The present application is directed to a medical device comprising adistal portion, a proximal portion and a helical structure incorporatedinto the distal end of the device so as to convert linear motion torotational motion (or otherwise create rotational motion) at the distalend of the device, such as a catheter (e.g., catheter, microcatheter,sheath, other intraluminal device, etc.). The helical structure may be asingle helix or a dual chirality helix. In some embodiments, asdiscussed in greater detail herein, a dual chirality helix comprises ahelix (e.g., having a first rotation, such as, a clockwise rotation) anda helix (e.g., having a second rotation opposite of the first rotation,such as, a counter-clockwise rotation). In some embodiments, the twohelices intersect with one another. According to some embodiments,displacement (e.g., linear displacement or other movement) of the dualchirality helix along its long axis results in rotation of the junctionof the two helices. While the medical device has application in humansurgical and diagnostic procedures, the present disclosure contemplatesthe device having application and use in human and non-human medicalprocedures, as well as, non-medical applications for industrial anddiagnostic procedures, such as inspections.

According to some embodiments, an intraluminal device comprises an outermember having at least one cut or feature that facilitates conversion oflinear movement of an inner member relative to the outer member intorotation of a distal portion of the device. Such rotational movement canfacilitate in maneuvering the distal end of the device through avasculature or other intraluminal structure of a subject (e.g., to reachor approach a desired anatomical location), as desired or required. Insome embodiments, as discussed in greater detail herein, theintraluminal device is configured to be directed to an intraluminallocation (e.g., intravascular, other intraluminal, anatomical location(e.g., through the subject's airways, gastroenterological system, etc.),etc.).

As discussed in greater detail herein, the various embodiments disclosedherein can provide advantageous devices, systems and/or methods tomanipulate the distal end of a medical device (e.g., catheter,microcatheter, sheath, other intraluminal device, etc.). In someembodiments, the device includes a tube or outer member comprising oneor more cuts (e.g., partial or complete cuts through the wall of thetube or outer member). In some embodiments, the cuts or similar featuresextend throughout the entire thickness of the tube or outer member.However, in other embodiments, the cuts extend only partially throughthe tube or outer member, as desired or required.

In some embodiments, the distal portion of the tube or outer membercomprises one or more cuts or other features. In some embodiments, suchcuts are helical or spiral in shape. In some embodiments, such helicalcuts have a constant or consistent orientation. However, in otherarrangements, the cuts have two or more orientations (e.g., angles,pitches, etc.) relative to the longitudinal axis, opening sizes, spacingand/or other properties, as desired or required. For example, in somearrangements, the cut(s) comprises/comprise a dual helix or dualchirality helix design. However, in other embodiments, the cutcomprises/comprise a single helix design (e.g., a cut having the samepitch, general direction of orientation, other properties and/or thelike).

According to some embodiments, a device comprises a tube or outermember, a pusher or inner member and one or more cuts or other featuresalong the distal end of the tube. In some embodiments, linear movementof the pusher member relative to the tube or outer member causesrotational movement (e.g., rotation, twisting, turning, etc.) of adistal portion of the tube. Such movement can help maneuver and/orotherwise manipulate the device through the vasculature or otherintraluminal system of a subject. In some embodiments, the tube or othermember is secured to the pusher or inner member along one or morelocations (e.g., the distal end of the device), using one or moresecurement (e.g., direct or indirect) methods, features, devices,technologies, etc.

In some embodiments, the cuts (e.g., partial or complete) through thetube or outer member comprise a helical or spiral shape. For example, insome embodiments, the cuts are angled relative to the longitudinal axisof the device (or a perpendicular axis of the longitudinal axis). Forexample, the helical angles can range from 10 to 80 degrees (e.g.,10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60,60-65, 65-70, 70-75, 75-80 degrees, angles between the foregoing ranges,etc.) relative to the longitudinal axis of the device. In someembodiments, the helical angle ranges from 15 to 75 degrees.

In some embodiments, the cuts are present only along or near the distalend of the tube or distal member. For example, the cut(s) is/are locatedalong the distal 0 to 20 percent (e.g., 0-1, 1-2, 2-3, 3-4, 4-5, 5-6,6-7, 7-8, 8-9, 9-10, 10-15, 15-20% of the tube and/or the device,percentages between the foregoing ranges and values, etc.).

According to some embodiments, the inner member, and thus the entireintraluminal device, is cannulated or otherwise comprises a lumen. Insome embodiments, such a device can allow for the passage of one or moreother devices, instruments and/or other members through its interior, asdesired or required. In some embodiments, the devices disclosed hereincomprise one or more external members, layers, coatings and/or othermembers.

Although several arrangements disclosed herein comprise a dual helix ordual chirality helix design, the conversion of linear to rotationalmovement can also be accomplished, and in certain embodiments can bepreferred and/or otherwise offer certain advantages, relative to thedual helix configurations. Thus, any of the embodiments disclosed hereincan be configured and/or otherwise adapted to include either a single ora multiple (e.g. dual chirality) helix design. Further, the medicaldevices disclosed herein can be adapted to perform the linear torotational conversion using designs that do not include a helix, asdiscussed in greater detail in the present specification and illustratedin the accompanying drawings.

As discussed in greater detail herein, the embodiments disclosed hereincan take the form of any one of various intraluminal devices, such as,for example, catheters, microcatheters, sheaths, other intraluminaldevices and/or the like. In some embodiments, the diameter (e.g., theouter diameter) of any of the intraluminal devices disclosed herein canvary between 1 mm to 11.333 mm or 1 French to 34 French (e.g., 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34 French, French valuesbetween the foregoing, etc.), as desired or required. However, in otherembodiments, the intraluminal device can comprise any other diameter orsize, such as, for example and without limitation, a custom size that isbelow, above or in between the values provided above. Further, thelength of the device can vary depending on the application or use. Insome embodiments, the length of the device is between 10 and 500 cm(e.g., 50 to 100, 100 to 300, 10 to 20, 20 to 30, 30 to 40, 40 to 50, 50to 60, 60 to 70, 70 to 80, 80 to 90, 90 to 100, 100 to 110, 110 to 120,120 to 130, 130 to 140, 140 to 150, 150 to 160, 160 to 170, 170 to 180,180 to 190, 190 to 200, 200 to 250, 250 to 300, 300 to 350, 350 to 400,400 to 450, 450 to 500 cm, lengths between the foregoing, etc.).

According to some embodiments, the intraluminal devices disclosed hereincan be used in a variety of applications and procedures. For example,the devices can be used to reach a particular organ or vasculature of asubject (e.g., heart or cardiac region, head and neck, liver, kidneys,hepatic vasculature, renal vasculature, extremities, etc.). Any otherportion of the anatomy can also be reached and targeted using thedevice. The various embodiments disclosed herein can be particularlyadvantageous when a practitioner is attempting to reach and treat aportion of a subject's anatomy that is accessible through a tortiousvascular or other intraluminal route (e.g., one that requires theintraluminal device to make several turns and directional changes). Thevarious devices disclosed herein can be used for a variety ofindications and procedures, such as, for example and without limitation,ablation procedures, stimulations or neuromodulation procedures,extractions, biopsies, aspirations, delivery of medicaments, fluids,energy (e.g., RF, ultrasound, cryogenic, etc.) and/or the like.

In some embodiments, imparting rotation on the distal portion at thedistal end (e.g., as opposed to rotating the entire length of themedical device) can help reduce stress on the vasculature, improve theaccuracy of the rotation of the medical device, reduce the risk ofuncontrolled release of potential energy from the medical device and/orprovide one or more additional advantages or benefits. These qualitiescan improve surgical efficiency, reduce overall time for the patient inthe operating theater, reduce the time that the patient is required tobe exposed to anesthesia, reduce the risk of surgical complications,reduce fatigue of the surgical staff during a medical procedure, reducethe exposure time of the patient to radiation (e.g., when a radiationsource is required during the operation) and the like.

The terms “top,” “bottom,” “first,” “second,” “upper,” “lower,”“height,” “width,” “length,” “end,” “side,” “horizontal,” “vertical,”and similar terms are used herein, it should be understood that theseterms have reference only to the structures shown in the figures and areutilized only to facilitate describing embodiments of the disclosure.Features depicted some embodiments may be used in other embodimentsdisclosed herein as would be understood by a person of ordinary skill inthe art.

FIG. 1 shows a system of imaging a medical device 10 within the humanbody 1 according to one embodiment. The depicted medical device includesa distal end 12 configured for use within the body 1, a proximal end 11for use outside the body 1, and a handle 13. In operation, the device 10can be monitored with an imaging device 3 which may project the medicaldevice's image 5 onto a monitor 4. The handle 13 may be configured tocontrol the operation of the distal end 12. The use of imaging (e.g.,imaging devices, monitors, etc.), irrespective of whether they areincluded with or without the device, can be incorporated andsynchronized with any of the embodiments disclosed herein.

FIGS. 2A-2B show the distal end 12 of the device 10 within anendoluminal structure 20 according to one embodiment. Endoluminalstructures including but not limited to blood vessels, the heart, thegastrointestinal (GI) tract, genitourinary (GU) tract, peritonealcavity, thoracic cavity, the mediastinum, bronchial passages,subarachnoidal spaces, and the intracranial ventricular system. In FIG.2A, a guidewire 14 is shown in the device 10 with the distal end of thedevice 12 directed away from a desired endoluminal branch 21. In FIG.2B, the distal end 12 and the guidewire 14 in the endoluminal structure20 of FIG. 2A have been rotated to point towards the desired endoluminalbranch 21.

FIG. 3A schematically illustrates a tube 30 with a dual chirality helix37 formed by a proximal helical cut 31 and a distal helical cut 32,wherein the cuts 31, 32 are proximal and distal relative to a junctionpoint 33. In the depicted embodiment, the distal cut 32 includes a cutwidth 38 a and a helical angle 39 a. Similarly, the proximal cut 31 hasa cut width 38 b and a helical angle 39 b. The cut widths 38 a, 38 b canrange from 0.1 micrometers to 10 millimeters (e.g., 0.1-0.2, 0.2-0.3,0.3-0.4, 0.4-0.5, 0.5-0.6, 0.6-0.7, 0.7-0.8, 0.8-0.9, 0.9-1, 1-2, 2-3,3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10 millimeters, values between theforegoing, etc.). In some embodiments, the cut width ranges from 10 to1000 microns. The helical angles 39 a, 39 b can range from 10 to 80degrees (e.g., 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50,50-55, 55-60, 60-65, 65-70, 70-75, 75-80 degrees, angles between theforegoing ranges, etc.) relative to the longitudinal axis of the device.In some embodiments, the helical angle ranges from 15 to 75 degrees. Thecut widths 38 a, 38 b may be equal or different, and the helical angles39 a, 39 b may have the same or different magnitudes. In someembodiments, when a force 34 is applied along a long axis 40 of the tube30, the force is converted into a force along the distal helix 35 and aforce along the proximal helix 36 that are exerted on the junction point33. The cut widths 38 a, 38 b and the helical angles 39 a, 39 b changeas the dual chirality helix 37 is elongated or reduced to impartrotational motion.

FIG. 3B shows a free body diagram of the force along the distal helix 35and the force along the proximal helix 36 wherein the respective forceshave been broken down into forces along the axis of the tube and forcestangential to the tube 30. This illustrates, in one embodiment, how theforces tangential to the tube 30 are additive and result in torqueing ofthe junction point 33.

FIGS. 4A-4C illustrates the rotation of a junction point 54 between aproximal helical cut 53 and a distal helical cut 52 when the distalportion of the tube 51 is elongated, according to one embodiment. FIG.4A shows the distal portion of the tube 51 not being elongated, whileFIG. 4B shows the distal portion of the tube 51 in an elongatedorientation (e.g., such that there is 90 degrees of rotation of thejunction point 54 and distal segment 55 relative to their respectivepositions in FIG. 4A). FIG. 4C shows the distal portion of the tube 51being elongated such that there is 180 degrees of rotation of thejunction point 54 and distal segment 55 relative to their respectivepositions in FIG. 4A.

FIG. 5 shows a flow chart for one embodiment of a method 500 ofcontrolling the distal end 12 of the device 10. In step 510, the device10 is inserted into the endoluminal structure 20 of the body 1. In step520, an image of the device 10 in the body 1 is displayed. The displaymay be in form of any imaging techniques for objects internal to thehuman body, including, but not limited to, x-ray fluoroscopy, ultrasoundimaging, computed axial tomography (CAT) imaging, magnetic resonanceimaging (MRI), and/or endoscopic imaging. In step 530, the region ofinterest is selected within the image. In step 540, longitudinal forceand displacement are applied to the dual chirality helix 37 causingrotation of the distal end 12. The longitudinal force may be applied bymanipulation of the sleeve 57 or wire 62. In some embodiments, thelongitudinal force may be applied through the application of energy toone or more actuators coupled to the medical device, such as magneticelements 117, 118 (FIG. 19A). In step 350, the change of position of thedistal end 12 is observed on the display. In step 360, the amount oflongitudinal displacement is adjusted to rotate the distal end 12 thedesired degree of rotation by varying the amount of longitudinal forceapplied to the dual chirality helix 37 either via the sleeve57/guidewire 62 or through energy applied to one or more actuators 117,118.

FIG. 6A is a diagram of a medical device 50 according to one embodimentof the present disclosure. As shown, the device 50 includes a tube 51, adistal segment 55 coupled to the distal end of the tube 51, and a sleeve58. The sleeve 58 is disposed within the lumen of the tube 51. Thesleeve 58 can be advanced or retracted within the tube 51 tolongitudinally displace the helices 52, 53. The device 50 also includesa handle 70, which is comprised of a proximal component 71 and a distalcomponent 72 and is attached to the proximal end of the tube 51. Theproximal component 71 and the distal component 72 each have cylindricalbodies, such that the proximal component 71 may be inserted into thedistal component 72 and the sleeve 58 may be inserted into the proximalcomponent 71. The proximal component 71 is reversibly coupled to thesleeve 58 and the distal component 72 is reversibly coupled to the tube51. Each of the tube 51, the distal segment 55, and the sleeve 58 can bemade of one or more of a variety of materials, including, but notlimited to, polyimide, polyurethane, polyether block amides (such asPebax®), nylon, nickel titanium (nitinol), stainless steel braiding, andhollow helical stranded tubing. In addition the distal segment 55 mayhave, but is not limited to, a straight, angled, and reverse curvedshape.

FIG. 6B is a close up of the distal segment and the distal end 51. Asshown, a dual chirality helix 67 is formed by a distal helix 52 and aproximal helix 53 that are coupled at a junction 54. The distal andproximal helices 52, 53 are formed from the tube 51 by helical cuts, andthe proximal helix 53 and the distal helix 52 converge at the junctionpoint 54. The distal segment 55 is located circumferentially around thedistal end of the tube 51 and is coupled to the junction point 54 via acoupling means 56. Suitable coupling means between the distal segment 55and the junction 54 include, but are not limited to, one or more of: 1)adhesives (such as cyanoacrylate), 2) welding, 3) brazing, 4) soldering,and 5) mechanical linking; and additional suitable means are known bythose of ordinary skill in the art. As shown, a wire 62 may be disposedwithin the lumen of the tube 51 and may be slidably advanced orwithdrawn from the tube 51 along the long axis of the tube 51. When thewire 62 is advanced, it may abut a capped end 61 of the tube 51. Furtheradvancement of the wire 62 after the wire abuts the capped end 61 mayresult in linear displacement of the dual chirality helix 67. The forceassociated with linear displacement of the dual chirality helix 67produces rotational forces at the junction 54 that rotate the distalsegment 55. As well known to one skilled in the art, a thin coil wire 64can be wound around the proximal end of the distal segment 55 andcoupled to the tube 51 to provide a smooth transition between the distalsegment 55 and the tube 51. Advantageously, the linear motion isconfined to the distal portion of the tube 51, specifically the dualchirality helix 67 and distal therefrom; thus, the entirety of the tube51 does not require linear displacement.

FIG. 7A is a longitudinal cross sectional view of the device 50 with anopen distal end 65 in the distal segment 55 in its resting state (i.e.no linear displacement of the dual chirality helix 67). The distalaspect of the device 50 is shown with the tube 51 wherein the dualchirality helix 67 is cut into the distal aspect of the tube 51 so as toform the proximal helix 53 and the distal helix 52. The cut section ofthe tube 51 may be cut entirely through the tube wall. The proximalhelix 53 and the distal helix 52 are formed such that they have oppositeorientations. For example, if the proximal helix 53 has a left handedorientation then the distal helix 52 has a right handed orientation orvice versa. The junction point 54 of the left and right handed helicesrotates when the dual chirality helix 67 is linearly extended orcompressed, resulting in the conversion of linear movement to rotationalmotion of the junction point 54 of the two helices. The distal segment55 is located circumferentially around the distal aspect of the tube 51in which the dual chirality helix 67 is cut. The distal segment 55 iscoupled to the junction point 54 of the helices of the dual chiralityhelix 67 via a coupling means 56. The distal segment 55 can have anangulated tip so as to aid in improved navigation of the device 50. Thetube 51 may include of a reduced luminal inner diameter distal to thedual chirality helix 67 that forms a shelf 57. The outer diameter of thesleeve 58 is greater than the inner diameter of the shelf 57 of the tube51 and is less than the inner diameter of the tube 51 proximal to theshelf 57. The sleeve 58 slidably contacts the shelf 57 of the tube 51.

FIG. 7B shows the position of the distal end 65 after advancement of thesleeve 58, which linearly displaces the dual chirality helix 67. This inturn results in rotation of the junction point 54 of the proximal helix53 and the distal helix 52 and subsequent rotation of the distal segment55. The degree of rotation of the junction point 54 is proportional tothe linear displacement of the dual chirality helix 67 of the tube 51.For illustration purposes 180 degree rotation is shown in FIG. 7B, butdifferent degrees of rotation may be achieved by increasing ordecreasing the degree of linear displacement of the sleeve 58.

FIG. 8A shows a cross sectional view of another embodiment of the distalsegment 55 of the device 50 in its resting state. The distal aspect ofthe device 50 is shown with the tube 51 with the distal end and theproximal end wherein the dual chirality helix 67 is cut into the distalaspect of the tube 51 so as to form the proximal helix 53 and the distalhelix 52. The distal segment 55 that is coupled to the junction point 54of the two helices of the dual chirality helix 67. The proximal helix 53and the distal helix 52 are formed such that they have oppositeorientations. For example, if the proximal helix 53 has a left handedorientation then the distal helix 52 has a right handed orientation orvice versa. By its nature, the junction point 54 of the left and righthanded helices rotates when the ends of the dual chirality helix 67 arelinearly extended or retracted, resulting in the conversion of linearmovement to rotational motion of the junction point 54 of the twohelices. The distal segment 55 is located circumferentially around thedistal aspect of the tube 51 in which the dual chirality helix 67 iscut. The distal segment 55 is coupled to the junction point 54 of thehelices of the dual chirality helix 67 via a coupling means 56. Thedistal segment 55 can have an angulated tip so as to aid in improvednavigation of the device 50. The tube 51 includes the shelf 57 with itsreduced luminal inner diameter distal to the dual chirality helix 67.The outer diameter of the sleeve 58 is greater than the inner diameterof the shelf 57 of the tube 51 and is less than the inner diameter ofthe tube 51 proximal to said shelf 57. The device 50 also includes awire 59. The wire 59 is disposed in the lumen of the tube 51 and adistal portion of the wire has a reduced diameter so that the distalportion of the wire 59 is dimensioned to pass through the reduced distaldiameter of the shelf 57. The remainder of the wire 59, or at least theportion adjacent to the distal portion has a diameter that is greaterthan the inner diameter of the shelf 57. Thus, the wire 59 with reduceddistal diameter slidably abuts and engages said shelf 57 of the tube 51.

In FIG. 8B, the wire 59 is shown advanced in the tube 51 and linearlydisplacing the dual chirality helix 67 as depicted in FIG. 8B. Thelinear displacing causes rotation of the junction point 54 of theproximal helix 53 and the distal helix 52 and subsequent rotation of thedistal segment 55. The degree of rotation of the distal segment 55 isproportional to the linear displacement of the dual chirality helix 67of the tube 51. For illustration purposes 180 degree rotation is shownin FIG. 8B, but different degrees of rotation may be achieved byincreasing or decreasing the degree of linear displacement of the wire59.

FIG. 9A shows a cross sectional view of another embodiment of the distalsegment 55 of the device 50 in its resting state with an open distal end65. The distal aspect of the device 50 is shown with the tube 51 withits distal end and its proximal end wherein a dual chirality helix 67 iscut into the distal aspect of the tube 51 so as to form the proximalhelix 53 and the distal helix 52. The distal segment 55 is coupled tothe junction point 54 of the two helices of the dual chirality helix 67.The proximal helix 53 and the distal helix 52 are formed such that theyhave opposite orientations. For example, if the proximal helix 53 has aleft handed orientation then the distal helix 52 has a right handedorientation or vice versa. By its nature, the junction point 54 of theleft and right handed helices rotates when the ends of the dualchirality helix 67 are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion of the junction point54 of the two helices. The distal segment 55 is locatedcircumferentially around the distal aspect of the tube 51 in which thedual chirality helix 67 is cut. The distal segment 55 is coupled to thejunction point 54 of the helices of the dual chirality helix 67 via acoupling means 56. The distal segment 55 can have an angulated tip so asto aid in improved navigation of the device 50. A wire 60 is disposedcoaxially within the lumen of the tube 51, and the wire 60 is reversiblyexpandable.

FIG. 9B shows the device 50 of FIG. 9A with the wire 60 expanded so thatthe expandable member 66 is extended to or greater than the diameter ofthe tube 51. When the reversibly expandable member 66 is expanded, itengages the distal end of the tube 51. When the wire 60 is advancedwhile the reversibly expanded member 66 is in its expanded state, thewire 60 induces linear displacement in the dual chirality helix 67. Thisin turn results in rotation of the junction point 54 of the proximalhelix 53 and the distal helix 52 and subsequent rotation of the distalsegment 55. The degree of rotation is proportional to the lineardisplacement of the dual chirality helix 67 of the tube 51. Forillustration purposes 180 degree rotation is shown in FIG. 9B, butdifferent degrees of rotation may be achieved by increasing ordecreasing the degree of linear displacement of the sleeve 58. When thereversibly expandable member 66 is collapsed, the outer diameter of thewire 60 is less than the inner diameter of the lumen of the tube 51 andthus the wire is able to move freely within the lumen of the tube 51, asshown in FIG. 9A.

FIG. 10A shows a cross sectional view of another embodiment of thedistal aspect of the device 50 in its resting state that includes acapped end 61 on the tube 51. The distal aspect of the device 50 isshown with the tube 51 having the distal end and the proximal endwherein the dual chirality helix 67 is cut into the distal aspect of thetube 51 so as to form the proximal helix 53 and the distal helix 52. Thedistal segment 55 is coupled to the junction point 54 of the two helicesof the dual chirality helix 67. The proximal helix 53 and the distalhelix 52 are formed such that they have opposite orientations. Forexample, if the proximal helix 53 has a left handed orientation then thedistal helix 52 has a right handed orientation or vice versa. By itsnature, the junction point 54 of the left and right handed helicesrotates when the ends of the dual chirality helix 67 are linearlyextended or retracted, resulting in the conversion of linear movement torotational motion of the junction point 54 of the two helices. Thedistal segment 55 is located circumferentially around the distal aspectof the tube 51 in which the dual chirality helix 67 is cut. The distalsegment 55 is coupled to the junction point 54 of the helices of thedual chirality helix 67 via a coupling means 56. The distal segment 55can have an angulated tip so as to aid in improved navigation of thedevice 50. A wire 62 is disposed coaxially within the lumen of the tube51. The wire 62 contacts the capped end 61, and advancing the wire 62applies force against the capped end 61 and linearly displaces the dualchirality helix 67 as shown in FIG. 10B. This in turn results inrotation of the junction point 54 of the proximal helix 53 and thedistal helix 52 and subsequent rotation of the distal segment 55. Thedegree of rotation is proportional to the linear displacement of thedual chirality helix 67 of the tube 51. For illustration purposes 180degree rotation is shown in FIG. 10B, but different degrees of rotationmay be achieved by increasing or decreasing the degree of lineardisplacement of the wire 62.

FIG. 11A shows a cross sectional view of another embodiment of thedistal aspect of the device 50 in its resting state with the capped end61 of the tube 51. The distal aspect of the device 50 is shown with thetube 51 having the distal end and the proximal end wherein the dualchirality helix 67 is cut into the distal aspect of the tube 51 so as toform the proximal helix 53 and the distal helix 52, and the distalsegment 55 is coupled to the junction point 54 of the two helices of thedual chirality helix 67. The proximal helix 53 and the distal helix 52are formed such that they have opposite orientations. For example, ifthe proximal helix 53 has a left handed orientation then the distalhelix 52 has a right handed orientation or vice versa. By its nature,the junction point 54 of the left and right handed helices rotates whenthe ends of the dual chirality helix 67 are linearly extended orretracted, resulting in the conversion of linear movement to rotationalmotion of the junction point 54 of the two helices. The distal segment55 is located circumferentially around the distal aspect of the tube 51in which the dual chirality helix 67 is cut. The distal segment 55 iscoupled to the junction point 54 of the helices of the dual chiralityhelix 67 via a coupling means 56. The tip of the distal segment 55 canhave an angulated tip so as to aid in improved navigation of the device50. A membrane or liner 63 is disposed within the lumen of the tube 51.Injection of fluid within the lumen of the tube 51 expands the membrane63, and imparts linear displacement on the dual chirality helix 67 asshown in FIG. 11B. This in turn results in rotation of the junctionpoint 54 of the proximal helix 53 and the distal helix 52 and subsequentrotation of the distal segment 55. The degree of rotation isproportional to the linear displacement of the dual chirality helix 67of the tube 51. The injection or withdrawal of fluid from the interiorof the membrane 63 can be precisely controlled, which allows for fineadjustments to the rotation of the distal segment 55. The fineadjustments enable the medical device 100 to be used with vasculaturethat has small vessels and allowed for selections of specific brancheswith little risk of impacting the vascular walls due to whip orovershooting a selected branch during rotation of the distal segment 55.Additionally, the fine adjustments enable precision positioning ofauxiliary equipment, such as a lamp for illumination of the interior ofthe body, where discrete and/or subtle adjustments in rotation angle arebeneficial or necessary. It is noted that fine adjustments also reducethe buildup of potential energy in the distal segment 55 that couldresult in whip if release too suddenly. For illustration purposes 180degree rotation is shown in FIG. 11B, but different degrees of rotationmay be achieved by increasing or decreasing the degree of lineardisplacement dual chirality helix 67 with the inflation/deflation of themembrane 63. In some embodiments, the single helix 203 may besubstituted for the dual chirality helix 67. See, e.g., FIGS. 23-25.

FIG. 12A shows a cross sectional view of a handle 70 that is suitable asan embodiment of the handle 13 shown in FIG. 1 for grasping the proximalend 11 of the device 10. The handle 70 may include a proximal component71 and a distal component 72, wherein the proximal component and 71 anda distal component 72 are coaxial with one another. The proximalcomponent 71 and the distal component 72 may be made of one or more of avariety of materials, including, but not limited to, one or more of:polycarbonate and metal. The distal component 72 has a cylinder 73 whichis configured to slidably receive the proximal aspect of the tube 51 andthe sleeve 58 or a wire 78. The proximal component 71 and the distalcomponent 72 configured to move relative to one another along the longaxis of the handle 70.

A distal fitting 76 is located on the distal end of the distal component72. This distal fitting 76 is flared away from the lumen 73. A proximalfitting 74 is located on the distal end of the proximal end of theproximal component 71 and is also flared away from the cylinder 73. Adistal compression nut 77 is fitted about the outer diameter of thedistal component 72. The distal fitting 76 is threaded such that thethreads mate with the distal compression nut 77. A proximal compressionnut 75 is fitted about the outer diameter of the proximal component 71.The proximal fitting 74 is threaded such that the threads mate with theproximal compression nut 75. FIG. 12B shows a short axis cross sectionthrough line A-A′. The proximal component 71 and the distal component 72are coaxial with each other and the wire 78.

FIG. 13 shows a cross section through the longitudinal axis of thehandle 70 with the proximal compression nut 75 and distal compressionnut 77 engaged with the threaded portion of the proximal fitting 74 andthe threaded portion of the distal fitting 76, respectively, such thatthe distal fitting 76 and the proximal fitting 74 are compressed towardsthe cylinder 73, rather than flared as in FIG. 12A.

FIGS. 14A-14C and FIGS. 15A-15C show a handle 80 that is suitable asanother embodiment of the handle 13 shown in FIG. 1 for grasping theproximal end 11 of the device 10. FIG. 14A shows the handle 80 includinga proximal component 81 and a distal component 82 wherein the proximalcomponent 81 and a distal component 82 are coaxial with one another. Theproximal component 81 and the distal component 82 may be made of one ormore of a variety of materials, including, but not limited to, one ormore of: polycarbonate and metal. The distal aspect of the proximalcomponent 81 has a threaded portion herein referred to as proximalcomponent threads 88 and the proximal portion of the distal component 82has a threaded portion herein referred to as distal component threads89. The proximal component 81 and the distal component 82 are capable ofdisplacement with respect to one another along the long axis of thehandle 80 via rotation of the proximal component 81 with respect to thedistal component 82. A swivel 90 is disposed within the proximalcomponent 81 such that the proximal fitting 84 and the proximalcomponent 81 may rotated relative to one another. The handle 80 has alumen 83 that is dimensioned to receive the proximal aspect of a tube 91and a sleeve or wire 92 that is disposed coaxially within the tube 91for at least part of its length.

A distal fitting 86 is located on the distal end of the distal component82. The distal end of the distal fitting 86 is flared away from thelumen 83. A proximal fitting 84 is located on the proximal end of theproximal component 81. The proximal end of the proximal fitting isflared away from the lumen 83. A distal compression nut 87 is fittedabout an outer diameter of the distal component 82. The distal fitting86 is threaded such that the threads mate with the distal compressionnut 87. A proximal compression nut 85 is fitted about the outer diameterof the proximal component 81. The proximal fitting 84 is threaded suchthat the threads mate with the proximal compression nut 85.

FIG. 14B shows a short axis cross section through line B-B′ of FIG. 14A,which passes through the distal fitting 86. The longitudinal displacer,such as sleeve or wire 92, is shown coaxial with the tube 91, and boththe sleeve or wire 92 and the tube 91 are coaxial with the distalfitting 86. Likewise, FIG. 14C shows a short axis cross section throughline C-C′ of FIG. 14A, which passes through the proximal fitting 84where it overlaps the distal fitting 86. The sleeve or wire 92 is showncoaxial with the tube 91, as well as, the proximal fitting 84 and thedistal fitting 86.

FIG. 15A shows a cross section through the longitudinal axis of thehandle 80 with the proximal compression nut 85 and the distalcompression nut 87 engaged with the threaded portion of the proximalfitting 84 and the threaded portion of the distal fitting 86,respectively, such that the distal fitting 86 and the proximal fitting84 are compressed towards the lumen 83. FIG. 15B shows a short axiscross section through line B-B′ of FIG. 15A, which passes through thedistal fitting 86. The sleeve or wire 92 are shown coaxial with the tube91, and both the sleeve or wire 92 and the tube 91 are coaxial with thedistal fitting 86. Likewise, FIG. 15C shows a short axis cross sectionthrough line C-C′ of FIG. 15A, which passes through the proximal fitting84 where it overlaps the distal fitting 86. The sleeve or wire 92 isshown coaxial with the tube 91, as well as, the proximal fitting 84 andthe distal fitting 86.

FIG. 16 is a diagram of another embodiment of the apparatus thatincludes a medical device 100 wherein a dual chirality helix 1709 (seeFIG. 17A) is cut into the distal aspect of the tube 101. The tube 101includes a material, including but not limited to nickel titanium(nitinol), selected to undergo a shape transformation in response to achange in the local environment, such that there is elongation of thedual chirality helix 1709. A conduit 108 is disposed within the tube101. The conduit 108 may be connected to a source 109 for an agent forchanging the local environment is located within the tube 101. Exemplaryagents for changing the local environment may include, but are notlimited to, one or more of: a battery for Joule heating or altering themagnetic field, a radiofrequency generator, a microwave generator, aheat source, a light source, and a chemical source of releasable ions.In one embodiment, the dual chirality helix 1709 may linearly elongatewhen exposed to an increase in temperatures. The elongation may takeplace over a temperature range of 40 degrees C. to 90 degrees C. In someembodiments, the temperature range for elongation may be between 40degrees C. and 60 degrees C. A distal segment 105 is coupled to thedistal aspect of the tube 101.

FIG. 17A is a longitudinal cross sectional view of the distal aspect ofone embodiment of the medical device 100 in its resting state wherethere is no linear displacement of the dual chirality helix 1709. Thedistal aspect of the medical device 100 is shown with the tube 101 witha distal end and a proximal end wherein the dual chirality helix 1709 iscut into the distal aspect of the tube 101 so as to form a proximalhelix 103 and a distal helix 102. The conduit 108 is located coaxiallywithin the lumen of the tube 101, and a distal segment 105 is coupled tothe junction point 104 of the two helices 102, 103 of the dual chiralityhelix 1709. The proximal helix 103 and the distal helix 102 are formedsuch that they have opposite orientations. For example, if the proximalhelix 103 has a left handed orientation then the distal helix 102 has aright handed orientation or vice versa.

By its nature, the junction point 104 of the left and right handedhelices rotates when the ends of the dual chirality helix 1709 arelinearly extended or retracted, resulting in the conversion of linearmovement to rotational motion of the junction point 104 of the twohelices 102, 103. The distal segment 105 is located circumferentiallyaround the distal aspect of the tube 101 in which the dual chiralityhelix 1709 is cut. The distal segment 105 is coupled to the junctionpoint 104 of the helices 102, 103 of the dual chirality helix 1709 via acoupling means 106 including, but not limited to, one or more of: 1)adhesives (such as cyanoacrylate), 2) welding, 3) brazing, 4) soldering,and 5) mechanical linkage. The distal segment 105 can have an angulatedtip so as to aid in improved navigation of the medical device 100. Someembodiments may include an optional means for counteracting shapetransformation of the tube 101, including, but not limited to, couplingthe conduit 108 to the distal end of the tube 101. In one embodiment,the tube 101 has a distal diameter that is slightly greater than therest of the tube 101 and a thin wire 1081 is run in the tube 101adjacent to said conduit 108, such as in the annular space between thetube 101 and the conduit 108. When tension is applied to the conduit 108with the thin wire 1081 in place, tension on the thin wire 1081counteracts the linear displacement of the dual chirality helix 1709.

FIG. 17B shows a longitudinal cross sectional view of the distal aspectof the embodiment of FIG. 17A when a change in the local environment 107is delivered to the environment around the dual chirality helix 1709,wherein local in proximity to the dual chirality helix 1709. Anexemplary change in the local environment may be a change in localtemperature that can cause part of the medical device 100 to undergoshape transformation due to heat expansion or contraction. The change inthe local environment may include one or more of changes in temperature,pH, magnetic field strength, ion concentration, and light. The change inthe local environment 107 may result in a shape transformation of theproximal helix 103 and distal helix 102 and cause linear displacement ofthe dual chirality helix 1709. The junction point 104 of the proximalhelix 103 and the distal helix 102 rotates and, in turn, rotates thedistal segment 105. The degree of rotation of the distal segment 105 isproportional to the linear displacement of the dual chirality helix 1709of the tube 101. For illustration purposes 180 degree rotation is shown.In some embodiments, the distal helix 102 and the proximal helix 103 maybe comprised of a shape member alloy (such as, but not limited to,nitinol) or a shape memory polymer (such as, but not limited to, blockcopolymer of polyethylene terephthalate (PET) and polyethyleneoxide(PEO)).

In some embodiments, the thin wire 1081 may be used to restrain thelongitudinal movement of the junction point 104. Thus, the user, byreleasing tension on the wire 1081 may allow the junction point 104 toextend longitudinally in a controlled fashion.

FIG. 18 is a diagram of another embodiment of the apparatus thatincludes a medical device 120 wherein a dual chirality helix 1937 (seeFIG. 19A) is cut into a distal aspect of a tube 121 and wherein anothermeans for linear displacement of the tube containing a dual chiralityhelical cut is provided. The tube 212 can be made of one or more of avariety of materials, including, but not limited to, polyimide,polyurethane, polyether block amides (such as Pebax®), nylon, nickeltitanium (nitinol), stainless steel braiding, coiled wire and hollowhelical stranded tubing. The proximal end of the medical device 120 isconnected to a source of electricity 129, such as a battery, whereinenergy is able to be transmitted along the device via conductiveelements, such as thin wires. A distal segment 125 is coupled to thedistal aspect of the tube 121. The linear displacement means includes,but is not limited to, repulsion or attraction of electrical fields ormagnetic fields between elements within or coupled to the distal end ofthe dual chirality helix 1937 that is capable of emitting a permanent orinducible magnetic field, and elements proximate to, but not in directcontact with the distal end of the dual chirality helix 1937 that iscapable of emitting a permanent or inducible magnetic field. Examples ofthese elements include, but are not limited to, rare earth magnets,coiled wire capable of passage of electrical current, electret, andplate capacitor. Examples of methods for applying opposing electrical ormagnetic fields along or proximate to the region of the dual chiralityhelix 1937 include but are not limited to 1) applying a permanentelectrical or magnetic charge on one end of the dual chirality helix1937 and a variable, inducible charge on the opposite end of the dualchirality helix 1937; 2) applying an inducible electrical or magneticcharge on one end of the dual chirality helix 1937 and a variable,inducible electrical or magnetic charge on the opposite end of the dualchirality helix 1937; 3) applying an electrical or magnetic charge onone end of the dual chirality helix 1937 and an electrical or magneticcharge on a portion of a guidewire 119 proximate to the dual chiralityhelix 1937.

FIG. 19A shows a longitudinal cross sectional view of the distal aspectof a medical device 110 suitable for use as an alternative for thedistal aspect of the medical device 120 of FIG. 18 in its resting state.The distal aspect of the medical device 110 is shown with a tube 111with a distal end and a proximal end wherein a dual chirality helix 1937is cut into the distal aspect of the tube 111 so as to form a proximalhelix 113 and a distal helix 112, a distal magnetic element 117, aproximal magnetic element 118, and a distal segment 115 that is coupledto the junction point 114 of the two helices 112, 113 of the dualchirality helix 1937. Each of the magnetic elements 117, 118 may bebiocompatible. Exemplary magnetic elements 117, 118 may include rareearth magnets and coil-electromagnets. The types of electromagnets usedfor magnetic elements 117 and 118 may be the same or different. Themagnetic elements 117, 118 are selected such that the force ofattraction/repulsion between the magnetic elements 117, 118, whenenergized, is sufficient to overcome the spring force of the dualchirality helix 1937. The magnetic elements 117, 118 may be connected tothe tube 111 in proximity to opposite ends of the dual chirality helix1937, so that magnetic force between the magnetic elements 117, 118,when energized, will elongate or compress the dual chirality helix 1937longitudinally, depending on the configuration of the magnetic elements117, 118 (attractive or repulsive magnetic force). In this manner, theenergizing of one or both of the magnetic elements 117, 118, byelongating or compressing the dual chirality helix 1937, impartsrotational force on the distal segment 115 without rotating theguidewire 119. Exemplary magnetic elements 117, 118 may includepermanent magnets (such as rare earth magnets) and electromagnets. Insome embodiments, one of the magnetic elements 117, 118 may be aferromagnetic material that response to a magnetic field is not itselfmagnetic. The proximal helix 113 and the distal helix 112 are formedsuch that they have opposite orientations. For example, if the proximalhelix 113 has a left handed orientation then the distal helix 112 has aright handed orientation or vice versa. By its nature, the junctionpoint 114 of the left and right handed helices rotates when the ends ofthe dual chirality helix 1937 are linearly extended or retracted,resulting in the conversion of linear movement to rotational motion ofthe junction point 114 of the two helices. The distal segment 115 islocated circumferentially around the distal aspect of the tube 111 inwhich the dual chirality helix 1937 is cut. The distal segment 115 iscoupled to the junction point 114 of the helices 112, 113 of the dualchirality helix 1937 via a coupling means 116. The coupling means 116may include, but is not limited to, one or more of: 1) adhesives (suchas cyanoacrylate), 2) welding, 3) brazing, 4) soldering, and 5)mechanical linking. The distal segment 115 can have an angulated tip soas to aid in improved navigation of the medical device 110.

FIG. 19B shows a longitudinal cross sectional view of the distal aspectof the medical device 110 from FIG. 19A when the magnetic field at leastone of the distal magnetic element 117 and the proximal magnetic element118 is changed, which causes linear displacement of the dual chiralityhelix 1937. This in turn rotates the junction point 114 of the proximalhelix 113 and the distal helix 112 and subsequent rotation of the distalsegment 115. The degree of rotation is proportional to the lineardisplacement of the dual chirality helix 1937 of the tube 111. Forillustration purposes 180 degree rotation is shown.

In some embodiments, a single helix 203 (see, e.g., FIGS. 23-25) can beused as an alternative to the dual chirality helix 1937 in the medicaldevice 110, such that the magnetic elements 117, 118 may be disposed onor in the tube 111 in contact with opposite ends of the single helix 203to realize elongation or compression of the single helix 203 to impartrotational motion on the distal segment 115 and/or the distal end of thetube 111. Similarly, this rotational motion may be imparted to thedistal end of the tube 201 in FIGS. 25A and 25B when magnetic elements117, 118 are disposed in the device 200 in substantially or identicallythe same position as in FIGS. 19A and 19B.

FIG. 20A is a longitudinal cross sectional view of the distal aspect ofan embodiment of the medical device 120 in its resting state. The distalaspect of the medical device 120 is shown with a tube 121 with a distalend and a proximal end (wherein a dual chirality helix 2037 is cut intothe distal aspect of the tube 121 to form a proximal helix 123 and adistal helix 122), a tube magnetic element 127, a guidewire magneticelement 128, and a distal segment 125 that is coupled to the junctionpoint 124 of the two helices 122, 123 of the dual chirality helix 2037.The proximal helix 123 and the distal helix 122 are formed such thatthey have opposite orientations. For example, if the proximal helix 123has a left handed orientation then the distal helix 122 has a righthanded orientation or vice versa. By its nature, the junction point 124of the left and right handed helices rotates when the ends of the dualchirality helix 2037 are linearly extended or retracted, resulting inthe conversion of linear movement to rotational motion of the junctionpoint 124 of the two helices. The distal segment 125 is locatedcircumferentially around the distal aspect of the tube 121 in which thedual chirality helix 2037 is cut. The distal segment 125 is coupled tothe junction 124 of the helices 122, 123 of the dual chirality helix2037 via a coupling means 126. The distal segment 125 may have anangulated tip so as to aid in improved navigation of the medical device120. The magnetic elements 127, 128 may include one or more of: apermanent magnet and an electromagnet. In some embodiments, one or bothof the magnetic elements 127, 128 may be a rare earth magnet. The tubemagnetic element 127 may comprise the same or a different magneticelement as the guidewire magnetic element 128. The magnetic elements127, 128 may be configured to impart attractive or repulsive forcebetween each other to impart linear displacement on the dual chiralityhelix 2037.

FIG. 20B demonstrates linear displacement of the dual chirality helix2037 when there is either 1) a change in the magnetic field of theeither the tube magnetic element 127 or the guidewire magnetic element128 or 2) a change in the distance between the tube magnetic element 127and the guidewire magnetic element 128. The linear displacement causesthe rotation of the junction point 124 of the proximal helix 123 and thedistal helix 122 and subsequent rotation of the distal segment 125. Thedegree of rotation is proportional to the linear displacement of thedual chirality helix 2037 of the tube 121. For illustration purposes 180degree rotation is shown.

FIG. 21A is a longitudinal cross sectional view of the distal aspect ofanother embodiment of the device in its resting state. The distal aspectof the device is shown with a tube 130 with a distal end and a proximalend, wherein a dual chirality helix 138 is cut into the distal aspect ofthe tube 130 to form a proximal helix 132 and a distal helix 131, and aguidewire 137 located within the lumen of the tube 130. The tube 130 canbe made of one or more of a variety of materials, including, but notlimited to, polyimide, polyurethane, polyether block amides (such asPebax®), nylon, nickel titanium (nitinol), stainless steel braiding,coiled wire and hollow helical stranded tubing. The proximal helix 132and the distal helix 131 are formed such that they have oppositeorientations. For example, if the proximal helix 132 has a left handedorientation then the distal helix 131 has a right handed orientation orvice versa. By its nature, the junction point 133 of the left and righthanded helices 131, 132 rotates when the ends of the dual chiralityhelix 138 are linearly extended or retracted, resulting in theconversion of linear movement to rotational motion of the junction point133 of the two helices. The tube 130 has a reduced inner diameter 136along its distal aspect. The distal aspect of the guidewire 137 has areduced diameter. The inner diameter of the distal end of the tube 130is greater than the diameter of the distal aspect of the guidewire 137but less than the non-reduced diameter of the guidewire 137. Theguidewire 137 may include one or more grooves 135 that located along thelongitudinal axis of the guidewire 137. An engagement means 134 forengaging the guidewire 137, such as a tooth 134 is disposed between theguidewire 137 and the tube 130 at the junction point 133 of the dualchirality helix 138. The tooth 134 slidably engages one or more of thegrooves 135 along the distal aspect of the guidewire 137. FIG. 21B showsa short axis cross section through line B-B′ of FIG. 21A, which passesthrough the tube at the junction point 133. The tooth 134 is shownprotruding from the tube 130 at the junction point 133 and meshing withone of the grooves 135 in the guidewire 137. FIG. 21C shows a short axiscross section through line C-C′ of FIG. 21A, which passes through theproximal helix 132 of the tube 130. Advancing the guidewire 137 into thetube 130 results in linear displacement of the dual chirality helix 138.This in turn results in rotation of the junction point 133 and tooth 134and subsequent rotation of the distal aspect of the guidewire 137 asdepicted in FIGS. 22A and 22B.

FIG. 22A shows a longitudinal cross sectional view through line A-A′ inFIG. 21B when the dual chirality helix 138 is displaced. FIG. 22B showsa longitudinal cross sectional view through line B-B′ in FIG. 21B whenthe dual chirality helix 138 is displaced. The degree of rotation isproportional to the displacement of the dual chirality helix 138 of thetube 130.

FIG. 23a illustrates a medical device 200 according to anotherembodiment of the present application. As shown, the device 200 caninclude a tube 201, a longitudinal displacer, such as, for example, asleeve 202, and a handle 270 that is attached to the proximal end of thetube 201. In some embodiments, a helical or spiral cut 203 is present inthe distal aspect of the tube 201 wherein the helical or spiral cut 203has a cut width 208 and helical angle 209. The end of the tube 201distal to the helical cut 203 may include a curve to aid in navigatingthe medical device 200 through the vasculature. The cut width 208 canrange from 0.1 micrometers to 30 millimeters. In some embodiments, thecut width may range from about 0.1 millimeters to about 10 millimeters.The helical angle can range from 10 to 80 degrees relative to thelongitudinal axis of the tube 201. In some embodiments, the helicalangle range from 15 to 75 degrees. The sleeve 202 is disposed within thelumen of the tube 201. The tube 201 may have a reduced inner diameter onthe distal end to form a shelf 204 that prevents forward movement of thesleeve 202. In some embodiments, the sleeve 202 may abut the shelf 204to transmit longitudinal force from the sleeve 202 to the tube 201. Insome embodiments, the sleeve 202 may be coupled to the tube 201 at apoint distal to the helical or spiral cut 203, such as at the shelf 204,and can be advanced or retracted within the tube 201 wherein advancementor retraction of the sleeve 202 results in advancement or retraction ofthe tube 201 distal to the helical or spiral cut 203. In someembodiments, the coupling means may be reversible, such as a solderconnection that can be melted by application of electric current or heatto release the sleeve 202 from the tube 201. Means of coupling thesleeve 202 and tube 201 include, but are not limited to, one or moreof: 1) frictional fit, 2) adhesives (such as cyanoacrylate), 3) welding,4) brazing, 5) soldering, and 6) mechanical linking. As depicted in FIG.23f the device 200 also includes a handle 270, which is comprised of aproximal component 271 and a distal component 272 and is attached to theproximal end of the tube 201. The proximal component 271 and the distalcomponent 272 each have cylindrical bodies, such that the proximalcomponent 271 may be inserted into the distal component 272 and thesleeve 202 may be inserted into the proximal component 271. The proximalcomponent 271 is reversibly coupled to the sleeve 202 and the distalcomponent 272 is reversibly coupled to the tube 201. Each of the tube,201 and the sleeve 202 can be made of one or more of a variety ofmaterials, including, but not limited to, polyimide, polyurethane,polyether block amides (such as Pebax®), nylon, nitinol, stainless steelbraiding, coiled wire and hollow helical stranded tubing. The lumen ofthe tube 201 and outer surface of the sleeve 202 preferentially have alow coefficient of friction, including but not limited to PTFE or ahydrophilic coating. In addition the distal aspect of the tube 201 mayhave, but is not limited to, a straight, angled, and reverse curvedshape. FIG. 23c is an axial cross section through line C-C′ in FIG. 23a. FIG. 23d is an axial cross section through line D-D′ in FIG. 23a .FIG. 23b is a longitudinal cross section of the device 200 in FIG. 23a .FIG. 23e is an axial cross section through line E-E′ in FIG. 23 a.

FIG. 24a shows the device 200 wherein the device 200 is in its restingstate (no longitudinal displacement) of the distal end of the tube 201.FIG. 24b shows the device 200 wherein there is longitudinal displacementof the distal end of the tube 201 by advancement of the sleeve 202 suchthat the distal end of the tube 201 results in 90 degrees of rotationrelative to the position of the distal end of the tube 201 in FIG. 24A.FIG. 24c shows the device 200 wherein there is further longitudinaldisplacement of the distal end of the tube 201 by advancement of thesleeve 202 such that the distal end of the tube 201 results in 180degrees of rotation relative to the position of the distal end of thetube 201 in FIG. 24A. FIG. 24d shows the device 200 wherein there isfurther longitudinal displacement of the distal end of the tube 201 byadvancement of the sleeve 202 such that the distal end of the tube 201results in 270 degrees of rotation relative to the distal position ofthe tube 201 in FIG. 24A.

FIG. 25a shows the device 200 wherein there device 200 is in its restingstate (no longitudinal displacement) of the distal end of the tube 201.FIG. 25b shows the device 200 wherein there is longitudinal displacementof the distal end of the tube 201 by retraction of the sleeve 202 suchthat the distal end of the tube 201 results in −90 degrees of rotation.

FIG. 26A is a longitudinal cross sectional view of a chronic totalocclusion crossing device embodiment 170 of the distal segment 171wherein the distal segment 171 and a lumen 173. In one embodiment thedistal segment 171 has a beveled tip 172. FIG. 26B is a short axis viewthrough line B-B′ in FIG. 26A.

FIG. 27A is a longitudinal cross sectional view of an endoscopeembodiment 180 of the distal segment wherein a camera 181 and a lightsource 182 are located at the distal end. There is a conduit 184 for thecamera (fiber optics or wiring) for transmission of information to theproximal end of the device, and a conduit for the light source 185(fiber optics or wiring) for transmission of energy (such as light orelectrical current) to the light source 182. Additional this embodiment180 can have a working channel for passage of instruments or delivery oraspiration of fluid. FIG. 27B is a short axis view through line B-B′ inFIG. 27A.

FIG. 28 is a longitudinal cross sectional view of an endoscopicinstrument embodiment 190 wherein there is a hollow portion 191, a solidportion 192 and a grasper 196.

FIG. 29 is a longitudinal cross sectional view of an endoscopicinstrument embodiment 190 wherein there is a hollow portion 191, a solidportion 192 and a cautery 197.

FIG. 30a shows a longitudinal cross section of the distal end of adevice 3000 wherein the device 3000 is in its resting state (nolongitudinal displacement). The device 3000 includes a tube 3001 and alongitudinal displacer such as a sleeve 3002. A helical or spiral cut3003 is present in the distal aspect of the tube 3001. The sleeve 3002is disposed within the lumen of the tube 3001. The sleeve 3002 iscoupled to the tube 3001 distal to the helical or spiral cut 3003, andthe sleeve 3002 may be advanced or retracted within the tube 3001wherein advancement or retraction of the sleeve 3002 causes advancementor retraction of the tube 3001 distal to the helical or spiral cut 3003.Said advancement or retraction of the tube 3001 results in rotation ofthe tube 3001 distal to the helical or spiral cut 3003 wherein theamount of rotation is proportional to the amount of advancement orretraction of the tube 3001. Means of coupling the sleeve 3002 and tube3001 include, but are not limited to, one or more of: 1) frictional fit,2) adhesives (such as cyanoacrylate), 3) welding, 4) brazing, 5)soldering, 6) mechanical linking, and 7) direct linkage by a member thatcan undergo electrolysis such as taught by Guglielmi in U.S. Pat. No.5,122,136 (herein incorporated by reference in its entirety), or othersuitable means understood by a person of ordinary skill in the art. Inaddition the tube 3001 may include of a reduced luminal inner diameterdistal to the helical or spiral cut 3003 that forms a shelf 3007. Theouter diameter of the sleeve 3002 is greater than the inner diameter ofthe shelf 3007 of the tube 3001, and the outer diameter of the sleeve3002 is less than the inner diameter of the tube 3001 proximal to theshelf 3007. The sleeve 3002 slide-ably contacts the shelf 3007 of thetube 3001. FIG. 30b shows the device 3000 with a longitudinaldisplacement of the distal end of the tube 3001 due to advancement ofthe sleeve 3002 such that the distal end of the tube 3001 results in a180 degree rotation relative to the position of the distal end of thetube 3001 in FIG. 30a . While a rotation of 180 degrees are shown, thisis illustrative and exemplary only, as adjustment of the lineardisplacement may adjust the amount of rotation to less than or more than180 degrees. FIG. 30c shows the device 3000 wherein the sleeve 3002 hasbeen removed and a liner 3009 has been inserted coaxially within thetube 3001. The ability to remove and or replace the sleeve 3002 enablesa user to modify the properties of the devices, such as pushability,trackability, or increase the luminal diameter. For example, replacingthe sleeve 3002 (such as a coiled wire) with a thin walled liner 3009(such as a thin walled polyimide tubing) provides a larger luminaldiameter through which therapeutic agents such as embolic materials (forexample: coils, particles, liquid embolics) can be delivered.Alternatively, if improved pushability or trackability is desired, acoiled wire or braided tube can be employed. As depicted in FIGS. 30aand 30b the sleeve 3002 is comprised of a coiled wire such distal aspectof the coiled wire has a reduced outer diameter that is less than theinner diameter of the shelf 3007. This provides a taper or smoothtransition between the guidewire 3010 and the distal tip of the tube3001. The outer diameter of the sleeve 3002 proximal to the shelf 3007is greater than the inner diameter of the shelf 3007.

FIG. 31a shows a longitudinal cross section of the distal end of adevice 3100 wherein the device 3100 is in its resting state (nolongitudinal displacement). The device 3100 includes a tube 3101 and alongitudinal displacer such as a sleeve 3102. A helical or spiral cut3103 is present in the distal aspect of the tube 3101. The sleeve 3102is disposed within the lumen of the tube 3101. A guidewire 3104 isdisposed within the lumen of the sleeve 3102. The sleeve 3102 has aradially expanded portion 3110 such that the radially expanded portion3110 abuts the tube 3101 distal to the helical or spiral cut 3103. Theradially expanded portion 3110 can be comprised of a Malecot type tubeor braided material or other suitable radially expandable material aswould be understood by a person of ordinary skill in the art. The sleeve3102 can be advanced or retracted within the tube 3101 whereinadvancement or retraction of the sleeve 3102 causes advancement orretraction of the tube 3101 distal to the helical or spiral cut 3103.Said advancement or retraction of the tube 3101 results in rotation ofthe tube 3101 distal to the helical or spiral cut 3103 where the amountof rotation is proportional to the amount of advancement or retractionof the tube 3101. FIG. 31b shows the device 3100 wherein there islongitudinal displacement of the distal end of the tube 3101 byadvancement of the sleeve 3102 such that the distal end of the tube 3101results in a 180 degree rotation relative to the position of the distalend of the tube 3101 in FIG. 31a , though it is contemplated thatadjusting the longitudinal displacement allows to use to adjust theamount of rotation to more or less than 180 degrees. FIG. 31c shows acollapse of the radially expanded portion 3110 by advancing astraightening element 3111 within the lumen of the sleeve 3102 to createtension on the radially expanded portion 3110 and thus collapse theradially expanded portion 3110.

FIG. 32a shows a longitudinal cross section of the distal end of adevice 3200 wherein the device 3200 is in its resting state (nolongitudinal displacement). The device 3200 includes a tube 3201 and alongitudinal displacer such as a sleeve 3202. A helical or spiral cut3203 is present in the distal aspect of the tube 3201. The sleeve 3202is disposed within the lumen of the tube 3201. A guidewire 3210 isdisposed within the lumen of the sleeve 3202. The sleeve 3202 is coupledto the tube 3201 distal to the helical or spiral cut 3203 and can beadvanced or retracted within the tube 3201 wherein advancement orretraction of the sleeve 3202 results in advancement or retraction ofthe tube 3201 distal to the helical or spiral cut 3203. Said advancementor retraction of the tube 3201 causes rotation of the tube 3201 distalto the helical or spiral cut 3203 where the amount of rotation isproportional to the amount of advancement or retraction of the tube3201. Means of coupling 3209 the sleeve 3202 and tube 3201 include, butare not limited to, one or more of: 1) frictional fit, 2) adhesives(such as cyanoacrylate), 3) welding, 4) brazing, 5) soldering, 6)mechanical linking, and 7) direct linkage by a member that can undergoelectrolysis, or other suitable means understood by a person of ordinaryskill in the art. FIG. 32b shows the device 3200 wherein there islongitudinal displacement of the distal end of the tube 3201 byadvancement of the sleeve 3202 such that the distal end of the tube 3201results in a 180 degree relative to the position of the distal end ofthe tube 3201 in FIG. 32a , though this degree of rotation may beadjusted to greater or less than 180 degrees by adjusting the lineardisplacement. FIG. 32c shows the device 3200 wherein the coupling 3209has been removed which enables the sleeve 3202 to be removed. Theability to remove and or replace the sleeve 3202 enables a user tomodify the properties of the devices, such as pushability, trackability,or increase the luminal diameter.

FIG. 33A schematically illustrates a medical device 4010 according toanother embodiment of the present disclosure. As depicted, the device4010 includes a tube 4011, an outer sheath 4015, a sleeve 4012 and ahandle assembly 4020. In the illustrated arrangement, the sleeve 4012 isdisposed within the lumen of the tube 4011. In the illustratedembodiment, the tube 4011 is disposed within the lumen of the outersheath 4015. Each of the tube 4011, the outer sheath 4015, and thesleeve 4012 can comprise one or more of a variety of materials,including, but not limited to, polyimide, polyurethane, polyether blockamides (such as Pebax®), nylon, nickel titanium (Nitinol), stainlesssteel, stainless steel braiding, and hollow helical stranded tubing. Inaddition the distal end of the tube 4011 may have, but is not limitedto, a straight, angled, and reverse curved shape. In some embodiments,the tube 4011 is located within the lumen of the outer sheath 4015 suchthat the one or more helical or spiral cut(s) 4013 in the distal aspectof the tube 4011 are disposed within the lumen of the outer sheath 4015while the distal end of the tube 4011 extends beyond the outer sheath4015 (e.g., the total length of the tube is greater than the totallength of the outer sheath, while the length from the proximal end ofthe tube to the distal most aspect of the cut portion of the tube isless than the total length of the outer sheath).

FIG. 33B illustrates a longitudinal cross section of a close up of thedistal aspect of the device 4010. In the depicted arrangement, one ormore helical or spiral cut(s) 4013 are present in the distal aspect ofthe tube 4011 wherein the one or more helical or spiral cut(s) 4013 hasa cut width and helical angle. The end of the tube 4011 distal to theone or more helical or spiral cut(s) 4013 may include a curve to aid innavigating the device 4010 through the vasculature. However, in otherembodiments, the end of the tube 4011 (both for the arrangementillustrated in FIGS. 33A and 33B, as well as any other arrangementsdisclosed herein, or variations thereof) is straight (not curved) and/orincludes some other feature or characteristic (e.g., tapered, flared,etc.), as desired or required. In some embodiments, the helical orspiral cuts extend throughout the entire wall thickness or depth of thetube 4011; however, in alternative embodiments, the cuts extend onlypartially through the wall, as desired or required. Thus, the cuts canbe recessed or scored portions of the tube, wherein a certain amount(e.g., but less than all, e.g., 5-10, 10-25, 25-50, 50-75, 75-99% of thematerial has been removed or was never there relative to adjacentportions of the wall in the first place). These features orcharacteristics of the cuts can be applied to any of the embodimentsdisclosed herein. Further, in some embodiments, helical or spiral cuts,as used herein, is configured to connote an orientation that is angledboth a longitudinal axis of the tube and a radial or transverse angle ofthe tube (e.g., angled relative to the perpendicular axis of thelongitudinal axis).

In some arrangements, the cut width can range from 0.1 micrometers to 30millimeters, depending on the size of the device, the materials used,the desired level and rotation response and/or one or more other factorsor considerations. In some embodiments, the cut width may range fromabout 0.1 millimeters to about 10 millimeters (e.g., 0.1-0.2, 0.2-0.5,0.5-1, 1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10 millimeters, valuesbetween the foregoing ranges, etc.), as desired or required. The helicalangle can range from 10 to 80 degrees (e.g., 10-15, 15-20, 20-25, 25-30,30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65, 65-70, 70-75, 75-80degrees, angles between the foregoing ranges, etc.) relative to thelongitudinal axis of the tube 4011. In some embodiments, the helicalangle can range from 15 to 75 degrees. The sleeve 4012 is disposedwithin the lumen of the tube 4011. The tube 4011 may have a reducedinner diameter on the distal end to form a shelf 4014 that prevents orat least partially limits forward movement of the sleeve 4012. In someembodiments, the sleeve 4012 may abut the shelf 4014 to transmitlongitudinal force from the sleeve 4012 to the tube 4011. In someembodiments, the sleeve 4012 may be coupled to the tube 4011 at a pointdistal to the one or more helical or spiral cut(s) 4013, such as at theshelf 4014, and can be advanced or retracted within the tube 4011wherein advancement or retraction of the sleeve 4012 results inadvancement or retraction of the tube 4011 distal to the one or morehelical or spiral cut(s) 4013. In some embodiments, the coupling meansmay be reversible, such as a solder connection that can be melted byapplication of electric current or heat to release the sleeve 4012 fromthe tube 4011. Means of coupling the sleeve 4012 and tube 4011 include,but are not limited to, one or more of: 1) frictional fit, 2) adhesives(such as cyanoacrylate), 3) welding, 4) brazing, 5) soldering, and 6)mechanical linking.

With further attention to the embodiments of FIGS. 33A and 33B, each ofthe tube, 4011 and the sleeve 4012 can be made of one or more of avariety of materials, including, but not limited to, polyimide,polyurethane, polyether block amides (such as Pebax®), nylon, Nitinol,stainless steel, stainless steel braiding, coiled wire, hollow helicalstranded tubing, any or any other suitable material, as desired orrequired. The lumen of the tube 4011 and outer surface of the sleeve4012 preferentially have a low coefficient of friction, including butnot limited to PTFE or a hydrophilic coating. In addition the distalaspect of the tube 4011 may have, but is not limited to, a straight,angled, and reverse curved shape. FIG. 33C is a longitudinalcross-sectional view of the distal end of the device in FIG. 33A withlongitudinal force at the proximal end causing a rotation of the distalend (e.g., by 180 degrees). FIG. 33D is an axial cross section throughline 33D-33D′ in FIG. 33A. FIG. 33E is an axial cross section throughline 33E-33E′ in FIG. 33A. FIG. 33F is an axial cross section throughline 33F-33F′ in FIG. 33A.

FIG. 34A illustrates a longitudinal cross section of a medical device5010 according to another embodiment of the present disclosure. Asillustrated, the device 5010 can include a tube 5011, an outer layer5030, a sleeve 5012 and a handle assembly 5020. The handle assembly 5020is comprised of a proximal component or portion 5021 and a distalcomponent or portion 5022. The distal component or portion 5022 iscoupled to the proximal end of the tube 5011. In the illustratedembodiment, the proximal component 5021 is coupled to the proximal endof the sleeve 5012. The proximal component 5021 and the distal component5022 can each have cylindrical bodies, such that the proximal component5021 may be inserted into the distal component 5022. However, as withany other embodiments disclosed herein, these components can any othercross-sectional shape (e.g., rectangular, oval, irregular, othernon-circular, etc.), as desired or required. Each of the tube 5011 andthe sleeve 5012 can comprise one or more of a variety of materials,including, but not limited to, polyimide, polyurethane, polyether blockamides (such as Pebax®), nylon, nickel titanium (Nitinol), stainlesssteel, stainless steel braiding, and hollow helical stranded tubing. Oneor more helical or spiral cut(s) 5013 are present in the distal aspectof the tube 5011. The cut width can range from 0.1 micrometers to 30millimeters. In some embodiments, the cut width may range from about 0.1millimeters to about 10 millimeters. The helical angle of the cut(s)5013 can range from 10 to 80 degrees relative to the longitudinal axisof the tube 5011. In some embodiments, the helical angle can range from15 to 75 degrees. In addition the distal end of the tube 11 may have,but is not limited to, a straight, angled, and reverse curved shape.

In some embodiments, a sleeve 5012 is disposed within the lumen of thetube 5011. The tube 5011 may have a reduced inner diameter on the distalend to form a shelf 5014 that prevents forward movement of the sleeve5012. In some embodiments, the sleeve 5012 may abut the shelf 5014 totransmit longitudinal force from the sleeve 5012 to the tube 5011. Insome embodiments, the sleeve 5012 may be coupled to the tube 5011 at apoint distal to the one or more helical or spiral cut(s) 5013, such asat the shelf 5014, and can be advanced or retracted within the tube 5011wherein advancement or retraction of the sleeve 5012 results inadvancement or retraction of the tube 5011 distal to the one or morehelical or spiral cut(s) 5013. In some embodiments, the coupling meansmay be reversible, such as a solder connection that can be melted byapplication of electric current or heat to release the sleeve 5012 fromthe tube 5011. Means of coupling the sleeve 5012 and tube 5011 include,but are not limited to, one or more of: 1) frictional fit, 2) adhesives(such as cyanoacrylate), 3) welding, 4) brazing, 5) soldering, and 6)mechanical linking. Each of the tube 5011 and the sleeve 5012 cancomprise one or more of a variety of materials, including, but notlimited to, polyimide, polyurethane, polyether block amides (such asPebax®), nylon, Nitinol, stainless steel, stainless steel braiding,coiled wire and hollow helical stranded tubing. The lumen of the tube5011 and outer surface of the sleeve 5012 preferentially have a lowcoefficient of friction, including but not limited to PTFE or ahydrophilic coating. The outer layer 5030 is disposed around the outersurface of tube 5011. The distal end of the outer layer 5030 is coupledto the tube 5011 distal to the one or more helical or spiral cut(s)5013. The proximal end of the outer layer 5030 is coupled to the tube5011 proximal to the one or more helical or spiral cut(s) 5013. Theportion of the tube 5011 containing the one or more helical or spiralcut(s) 5013 is able to move along the longitudinal axis with respect tothe outer layer 5030.

In some embodiments, the outer layer 5030 or at least a portion of theouter layer is able to undergo elongation as the portion of the tube5011 containing the one or more helical or spiral cut(s) 5013 undergoeselongation. The outer layer 5030 can comprise one or more of a varietyof materials, including, but not limited to, thin walled PET tubing,polyimide, polyurethane, polyether block amides (such as Pebax®), nylon,Nitinol, stainless steel, stainless steel braiding, coiled wire andhollow helical stranded tubing. FIG. 34B is an axial cross sectionthrough line 34B-34B′ in FIG. 34A.

FIG. 35A illustrates a diagram of medical device 6010 according to oneembodiment of the present disclosure. The device includes a tube 6011,an outer tubular member 6020 and a handle assembly 6025. In theillustrated embodiment, the handle assembly 6025 comprises a proximalhandle component 6026 and a distal handle component 6027. The proximalhandle component 6026 and the distal handle component 6027 can becoaxial with one another and slidably engage with one another. As shown,the proximal handle component 6026 can be coupled to the proximal end oftube 6012, and the distal handle component 6027 is coupled to theproximal end of the outer tubular member 6022.

FIG. 35B provides a detailed view of the distal aspect of the device6010 of FIG. 35A. One or more helical or spiral cuts 6014 can be locatedalong the distal aspect of the tube 6011 as depicted in FIG. 35B. Insome embodiments, the tube 6011 is disposed within the outer tubularmember lumen 6023. In some embodiments, each of the tube 6011 and theouter tubular member 6020 comprise one or more of a variety ofmaterials, including, but not limited to, polyimide, polyurethane,polyether block amides (such as Pebax®), nylon, nickel titanium(Nitinol), stainless steel, stainless steel braiding, coiled wire andhollow helical stranded tubing. In some embodiments, the outer tubularmember lumen 6023 and outer surface of the tube 6011 advantageously havea low coefficient of friction via, including but not limited to, PTFE, ahydrophilic coating, other relatively low friction coatings or materialsand/or the like. The distal end of the tube 6013 may have, but is notlimited to, a straight, angled, and reverse curved shape to aid innavigating the device 6010 through the human body. In addition, thedistal end of the tube 13 can have one or more malleable elements suchthat the distal end of the tube 13 can be manually shaped by theoperator at the time of use.

According to some embodiment, one or more helical or spiral cut(s) 6014are present in the distal aspect of the tube 6011. In some arrangements,the one or more helical or spiral cut(s) 6014 has a cut width 6015 and ahelical angle 6016. In some embodiments, the cut width 6015 can rangefrom 0.1 micrometers to 30 millimeters. In some embodiments, the cutwidth 6015 may range from about 0.1 millimeters to about 10 millimeters.In some configurations, the helical angle 6016 can range from 10 to 80degrees relative to the longitudinal axis of the tube 6011. In someembodiments, the helical angle 6016 can range from 15 to 75 degrees. Insome embodiments, the distal end of the outer tubular member 6021 iscoupled to the tube 6011 distal to the one or more helical or spiralcut(s) 6014. Means of coupling the distal end of the outer tubularmember 6021 and tube 6011 include, but are not limited to, one or moreof: 1) frictional fit, 2) adhesives (such as cyanoacrylate), 3) welding,4) brazing, 5) soldering, and 6) mechanical linking.

FIG. 35C illustrates a close up of a longitudinal cross-sectional viewof the distal end of the device in FIG. 35A. As noted herein, in someembodiments, advancement of the outer tubular member 6020 relative tothe tube 6011 results in displacement of the helical or spiral cut(s)causing rotation of the distal end (e.g., by 180 degrees or some otherdesired angle). FIG. 35D illustrates a close up of a longitudinalcross-sectional view of the distal end of the device in FIG. 35A whilein its resting state (e.g., 0 degrees of rotation). Further, FIG. 35Eillustrates an axial cross section through line 35E-35E′ in FIG. 35D,FIG. 1F illustrates an axial cross section through line 35F-35F′ in FIG.35D, and FIG. 35H illustrates an axial cross sectional view through line35H-35H′ in FIG. 35D.

FIG. 36A schematically illustrates another embodiment of a medicaldevice 7010 that is configured to facilitate rotation of a distal end orportion. As shown, the device can include a tube 7011, an outer tubularmember 7020 and a handle assembly 7025. FIG. 36B illustrates a detailedview of the distal portion or aspect of the device 7010. As with otherembodiments disclosed herein, the illustrated device can include one ormore helical or spiral cuts 7014 are located along the distal aspect ofthe tube 7011. In some embodiments, the tube 7011 is disposed within theouter tubular member lumen 7023. The depicted tube 7011 comprises two ormore outer diameters, wherein the outer diameter of the distal end ofthe tube 7013 is greater than the outer tubular member lumen 7023, whilethe outer diameter from the proximal end of the tube up to and includingthe helical or spiral cuts 7014 is less than the outer tubular memberlumen 7023.

With continued attention to FIG. 36A, the handle assembly 7025 of thedevice 7010 comprises a proximal handle component 7026 and a distalhandle component 7027. In some embodiments, the proximal handlecomponent 7026 and the distal handle component 7027 are coaxial with oneanother and slidably engage with one another. The proximal handlecomponent 7026 can be coupled to the proximal end of tube 7012, and thedistal handle component 7027 can be coupled to the proximal end of theouter tubular member 7022. Each of the tube 7011 and the outer tubularmember 7020 can comprise one or more of a variety of materials,including, but not limited to, polyimide, polyurethane, polyether blockamides (such as Pebax®), nylon, nickel titanium (Nitinol), stainlesssteel, stainless steel braiding, coiled wire and hollow helical strandedtubing. In some embodiments, the outer tubular member lumen 7023 andouter surface of the tube 7011 advantageously have a low coefficient offriction (e.g., via the use of materials, such as, for example, PTFE,one or more hydrophilic coatings and/or the like).

According to some arrangements, the distal end of the tube 7013 mayhave, but is not limited to (and/or does not need to have), a straight,angled, and reverse curved shape to aid in navigating the device 7010through the human body. In addition, the distal end of the tube 7013 canhave one or more malleable elements such that the distal end of the tube7013 can be manually shaped by the operator at the time of use. Suchshaping features can be implanted into any of the embodiments disclosedherein. In some embodiments, one or more helical or spiral cut(s) 7014are present in the distal aspect of the tube 7011. By way of example,and without limitation, one or more of the helical or spiral cut(s) 14can comprise a cut width 7015 and a helical angle 7016. The cut width7015 can range from 0.1 micrometers to 30 millimeters. In someembodiments, the cut width 7015 may range from about 0.1 millimeters toabout 10 millimeters. The helical angle 7016 can range from 10 to 80degrees relative to the longitudinal axis of the tube 7011. In someembodiments, the helical angle 7016 can range from 15 to 75 degrees.

In some configurations, the distal end of the tube 7013 transitions to agreater outer diameter distal to the helical or spiral cut(s) 7014. Thedistal end of the outer tubular member 7021 may abut the distal end ofthe tube 7013 where it transitions to a greater diameter. In somearrangements, the relative advancement of the outer tubular member 7020results in elongation of the helical or spiral cut(s) 7014, and thus,rotation of the distal end of the tube 7013. In some embodiments, thedistal end of the tube 7013 is able to rotate freely or substantiallyfreely with respect to the distal end of the outer tubular member 7021.

FIG. 36C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 36A. As noted herein, in some embodiments,advancement of the outer tubular member 7020 relative to the tube 7011results in displacement of the helical or spiral cut(s), thereby causingrotation of the distal end (e.g., by 180 degrees or some other desiredangle). Such rotation of the device illustrated in FIGS. 36A-36F, and/orany other devices disclosed in the present application, can facilitateadvancing an intraluminal device (e.g., guidewire, microcatheter,catheter, sheath, endoscope, etc.) within the anatomy of the subjectbeing treated. Further, FIG. 36D illustrates a longitudinal crosssection of a close up of the distal aspect of the device 7010 while inits resting state (0 degrees of rotation), FIG. 36E illustrates an axialcross section through line 36E-36E′ in FIG. 36D, FIG. 36F illustrates anaxial cross section through line 36F-36F′ in FIG. 2D, and FIG. 2Gillustrates an axial cross sectional view through line 36G-36G′ in FIG.36D.

FIG. 37A illustrates an intraluminal device 8010 according to anotherembodiment of the present disclosure. As shown, the device 8010comprises a tube 8011, a core wire 8030, an outer tubular member 8020and a handle assembly 8025. FIG. 37B illustrates a detailed view of thedistal aspect or portion of the device 8010 of FIG. 37A. As with otherembodiments disclosed herein, one or more helical or spiral cuts 8014can be located along the tube 8011. The proximal end of the tube 8012can be coupled to the distal end of the core wire 8032. Means ofcoupling include, but are not limited to, one or more of: 1) frictionalfit, 2) adhesives (such as cyanoacrylate), 3) welding, 4) brazing, 5)soldering, and 6) mechanical linking. The core wire 30, proximal end ofthe tube 8012 and the portion of the tube 8011 containing the helical orspiral cut(s) 14 can be disposed within the lumen of the outer tubularmember 8023. In some embodiments, the tube 8011 includes two or moreouter diameters, wherein the outer diameter of the distal end of thetube 13 is greater than the outer tubular member lumen 8023, while theouter diameter from the proximal end of the tube 8011 up to andincluding the helical or spiral cuts 8014 is less the outer tubularmember lumen 8023. In some arrangements, the outer diameter of the corewire 8030 is less than the outer tubular member lumen 8023 (e.g., suchthat the outer tubular member 8020 can slide coaxially along the corewire 8030).

With continued reference to FIG. 37A, the handle assembly 25 cancomprise a proximal handle component 8026 and a distal handle component8027. In some embodiments, the proximal handle component 8026 and thedistal handle component 8027 are coaxial with one another and slidablyengage with one another. The proximal handle component 8026 can becoupled to the proximal end of core wire 31, and the distal handlecomponent 8027 can be coupled to the proximal end of the outer tubularmember 8022. Each of the tube 8011 and the outer tubular member 8020 cancomprise one or more of a variety of materials, including, but notlimited to, polyimide, polyurethane, polyether block amides (such asPebax®), nylon, nickel titanium (Nitinol), stainless steel, stainlesssteel braiding, coiled wire, hollow helical stranded tubing and/or thelike.

In some embodiments, the lumen of the outer tubular member 8023 andouter surface of the tube 8011 advantageously have a low coefficient offriction (e.g., via the use of PTFE, a hydrophilic coating and/or othermaterials or features with a relatively low coefficient of friction).The distal end of the tube 8013 may have, but is not limited to, astraight, angled, and reverse curved shape to aid in navigating thedevice 8010 through the human body. In addition, the distal end of thetube 8013 can have one or more malleable elements such that the distalend of the tube 8013 can be manually shaped by the operator at the timeof use. In some embodiments, one or more helical or spiral cut(s) 8014are present in the distal aspect of the tube 8011. The one or morehelical or spiral cut(s) 8014 can have a cut width 8015 and a helicalangle 8016. The cut width 8015 can range from 0.1 micrometers to 30millimeters. In some embodiments, the cut width 8015 may range fromabout 0.1 millimeters to about 10 millimeters. The helical angle 8016can range from 10 to 80 degrees relative to the longitudinal axis of thetube 8011. In some embodiments, the helical angle 8016 can range from 15to 75 degrees. In some configurations, the distal end of the tube 8013transitions to a greater outer diameter distal to the helical or spiralcut(s) 8014. The distal end of the outer tubular member 8021 may abutthe distal end of the tube 8013 where it transitions to a greaterdiameter, wherein relative advancement of the outer tubular member 8020results in elongation of the helical or spiral cut(s) 8014 and thusrotation of the distal end of the tube 8013. In some embodiments, thedistal end of the tube 8013 is configured to rotate freely orsubstantially freely with respect to the distal end of the outer tubularmember 8021.

FIG. 37C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 37A. As noted herein, in some embodiments,advancement of the outer tubular member 8020 relative to the tube 8011results in displacement of the helical or spiral cut(s) causing rotationof the distal end (e.g., by 180 degrees, other desired angles, etc.).FIG. 37D illustrates a detailed longitudinal cross sectional view of thedistal aspect of the device 8010, FIG. 3E illustrates an axial crosssectional view through line 37E-37E′ in FIG. 37D, FIG. 37F illustratesan axial cross sectional view through line 37F-37F′ in FIG. 37D, andFIG. 37G illustrates an axial cross sectional view through line 37G-37G′in FIG. 37D.

FIG. 38A illustrates a longitudinal cross-sectional view of anotherembodiment of an intraluminal medical device 9040. As shown, the deviceincludes a tube 9041, an inner tubular member 9047, a distendable layeror member (e.g., balloon, other expandable member, etc.) 50 along theouter surface of the cut portion of the tube 9041 and a handle assembly9025. In some embodiments, the handle assembly 9025 comprises a proximalhandle component 9026 and a distal handle component 9027. In someembodiments, the proximal handle component 9026 and the distal handlecomponent 9027 are coaxial with one another and can engage with oneanother via multiple means, such as, for example and without limitation,corresponding threaded components. In some embodiments, the proximalhandle component 9026 is coupled to the proximal end of the innertubular member 9049 via a swivel or other movable portion 9029, and thedistal handle component 9027 is coupled to the proximal end of the tube9042.

With continued reference to FIG. 38A, the proximal handle component 9026comprises an inflation port 9028 for injection of fluid so as to distendthe distendable or expandable member 9050 (e.g., balloon). In someembodiments, as shown, one or more helical or spiral cuts 9044 arelocated along the distal aspect of the tube 9041. The inner tubularmember 9047 can be disposed within the lumen of the tube 9041. The tube9041 and the inner tubular member 9047 can comprise one or more of avariety of materials, including, but not limited to, polyimide,polyurethane, polyether block amides (such as Pebax®), nylon, nickeltitanium (Nitinol), stainless steel, stainless steel braiding, coiledwire and hollow helical stranded tubing. In some embodiments, the lumenof the tube 9041 and outer surface of the inner tubular member 9047advantageously have a low coefficient of friction, e.g., via includingusing materials such PTFE, hydrophilic coatings and/or the like. In someembodiments, the distal end of the tube 9043 has, but is not limited to,a straight, angled, and reverse curved shape to aid in navigating thedevice 9040 through the human body. In addition, the distal end of thetube 9043 can have one or more malleable elements such that the distalend of the tube 9043 can be manually shaped by the operator at the timeof use. In some embodiments, the helical or spiral cut(s) 9044 arepresent in the distal aspect of the tube 9041, wherein the one or morehelical or spiral cut(s) 9044 has a cut width and a helical angle, asdescribed. The cut width can range from 0.1 micrometers to 30millimeters. In some embodiments, the cut width may range from about 0.1millimeters to about 10 millimeters. The helical angle can range from 10to 80 degrees relative to the longitudinal axis of the tube 9041. Insome embodiments, the helical angle can range from 15 to 75 degrees. Thedistal end of the inner tubular member 9048 is coupled to the tube 9041distal to the one or more helical or spiral cut(s) 9044. Means ofcoupling the distal end of the inner tubular member 9048 and tube 9041include, but are not limited to, one or more of: 1) frictional fit, 2)adhesives (such as cyanoacrylate), 3) welding, 4) brazing, 5) soldering,and 6) mechanical linking. As shown, the distendable layer 9050 can belocated along the outer surface of the cut portion of the tube 9041.

FIG. 38B illustrates a transverse cross section of FIG. 38A throughlines 38B-38B′. The distendable layer 9050 can be distended as depictedin FIG. 38C (e.g., by injection of fluid through the inflation port 29).The injected fluid (e.g., water, saline, other liquids, gases, etc.) isable to travel within the space between the tube 9041 and the innertubular member 9047. The fluid can subsequently travel through the oneor more helical or spiral cut(s) 9044 into the space between the cutportion of the tube 9041 and the distendable member 9050. FIG. 38D is atransverse cross section of FIG. 38C through lines 38C-38C′. Theseconfigurations can be beneficial in preventing reflux and nontargetembolization during delivery of embolic material including but limitedto radioembolic particles (e.g., Y-90).

FIG. 39 illustrates another embodiment of an intraluminal device 960. Aswith other embodiments disclosed herein, the device 960 is configured toadvantageously use longitudinal movement of one member or component(e.g., relative to another member or component) to create predictable,reliable and responsive rotation of the distal portion of the device.For example, in the illustrated arrangement, the inner member or pusher962 is sized, shaped and otherwise configured to slidably move within alumen of a tube or outer member 961 positioned along the outside of thepusher or inner member 962. In the illustrated arrangement, the pusheror inner member 962 is configured to abut a flanged or shoulder portionformed along an interior of the tube 961 along the device's distalportion. As discussed herein with reference to other embodiments,advancing the pusher or inner member 962 once the distal end of thepusher contacts the interior shoulder portion of the tube causes thedistal portion of the tube or outer member 961 to rotate. In someembodiments, this results from the presence, configuration and otherdetails of the cut(s) 963 (e.g., helical or spiral cuts) located alongthe distal end of the tube. In the embodiment of FIG. 39, the pusher 962is not attached to the tube 961. Thus, the pusher or inner member 962can be partially or completely removable from the tube (and thus, fromthe rest of the device). As shown, the device can include one or moreouter layers, coatings, portions, components and/or the like 966 alongthe exterior of the tube 961. Such layers or portions 966 can be securedto the tube 961 and/or other portions of the device 960 (e.g., usingadhesives, friction fit connections, etc.).

FIG. 40 illustrates an embodiment of an intraluminal device 970 similarto the one depicted in FIG. 39; however, in the device 970 of FIG. 40,the pusher or inner member 972 is attached or otherwise coupled (e.g.,directly or indirectly) to the tube 971 (as well as one or more otherlayers or portions of the device, e.g., the outer layer positioned alongthe exterior of the device). As shown in FIG. 40, in some embodiments,the pusher or inner member 972 is secured to tube 971 along the distalend 974 of the device 970. In some embodiments, the distal end 974 ofthe device 970 can include a tapered tip (or other portion having areduced diameter or other cross-sectional size). This can assist inpositioning the distal end 974 of the device in a desired portion of asubject's anatomy and such a feature can be incorporated into any of theembodiments disclosed herein, even if not discussed or illustratedspecifically in connection with such embodiments.

With continued reference to FIG. 40, the outer layer, coating or otherouter portion 976 can also be secured or otherwise coupled or disposedrelative to the tube 971 at one or more attachment sites. In someembodiments, such an attachment site or sites 979 is/are located at ornear the distal end 974 of the device. However, the outer layer 976 andthe tube 971 can be secured (e.g., directly or indirectly (using, forexample, one or more intermediate members or features)) continuously orintermittently at one or more locations of the device, either in lieu ofor in addition to the distal end 974 of the device 970, as desired orrequired. As noted above, such an outer member, coating or other member976 can be incorporated into any of the embodiments disclosed herein.

In any of the embodiments disclosed in the present application,including the devices illustrated in FIGS. 39 and 40, one or morecomponents of the device can include a wire (e.g., thin coil wire) thatis wound (e.g., about a base member, about itself, etc.). For example,the pusher or inner member 962, 972 in FIG. 39 or 40 can include such awound member, as can any other embodiments disclosed herein orequivalents thereof. For any embodiments disclosed herein, a pusher orinner member can be sized to provide a desired amount of clearancebetween the outer diameter or other cross-sectional dimension of thepusher and the inner diameter or other dimension of the tube (e.g., topermit the pusher to freely slidably move relative to the tube withoutbinding, sticking or other problems). Such wound members can provide thedesired rigidity to the pusher and/or other components or portions ofthe device without buckling or encountering other problems.

Likewise, the outer or exterior layer of the device (e.g., the outerlayer or coating 976 in the embodiment depicted in FIG. 40) can includeone or more layers of a wound wire, coil or other member, either aloneor in combination of another coating or member (e.g., layer of athermoplastic, metallic member, etc.). Such an outer member can shieldand protect the tube (e.g., the cut section of the tube), provide asmoother outer surface of the device and/or provide additional benefitsor advantages.

FIG. 41A illustrates a medical device 10000 according to anotherembodiment of the present application. As shown, the device 10000 caninclude a tube 10001, a longitudinal displacer, pusher or other innermember 10002, and a handle (not shown) that is attached to the proximalend of the tube 10001. In the depicted embodiment, a partial thicknesshelical or spiral cut 10003 is included at or along the distal portionof the tube 10001. In some embodiments, the partial thickness helical orspiral cut 10003 includes a cut width 10008 and helical angle 10009. Thecut width 10008 and/or helical angle 10009 can be identical or similarto any of the embodiments disclosed herein, including for example andwithout limitation, the embodiments illustrated and disclosed withreference to FIG. 3A.

In some embodiments, the partial thickness cut 10003 extends onlypartially through the wall of the tube 10001. Such a partial thicknesscut 10003 can be incorporated into any of the embodiments disclosedherein. For example, in any of the arrangements disclosed herein,including without limitation the device illustrated in FIG. 41A, the cut10003 extends 10 to 90% (e.g., 10-15, 15-20, 20-25, 25-30, 30-35, 35-40,40-45, 45-50, 50-55, 55-60, 60-65, 65-70, 70-75, 75-80, 80-85, 85-90%,percentages between the foregoing ranges, etc.) of the overall thicknessof the wall of the tube 10001, as desired or required.

With continued reference to FIG. 41A, the end of the tube 10001 distalto the partial thickness helical cut 10003 can comprise a curve to aidin navigating the medical device 10000 through the vasculature. Forexample, such a configuration can help the user manipulate the device10000 through various curves and turns to access a desired portion orlocation of the subject's anatomy. In some embodiments, the cut width10008 is between 0.1 micrometers and 30 millimeters (e.g., 0.1-0.2,0.2-0.3, 0.3-0.4, 0.4-0.5, 0.5-0.6, 0.6-0.7, 0.7-0.8, 0.8-0.9, 0.9-1,1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10, 10-15, 15-20, 20-30,30-40, 40-50, 50-60, 60-70, 70-80, 80-90, 90-100, 100-150, 150-200,200-250, 250-300, 300-400, 400-500, 500-600, 600-700, 700-800, 800-900micrometers, 900 micrometers to 1 millimeters, 1-2, 2-3, 3-4, 4-5, 5-6,6-7, 7-8, 8-9, 9-10, 10-15, 15-20, 20-25, 25-30 millimeters, widthsbetween the foregoing values, etc.). In some embodiments, the cut widthranges from 0.1 millimeters to 10 millimeters (e.g., 0.5-5 millimeters).In other configurations, the cut width is less than 0.1 micrometers orgreater than 30 millimeters (e.g., 30-40, 40-50, 50-100, values betweenthe foregoing, greater than 100 millimeters), as desired or required fora particular application or use.

In some embodiments, including for the arrangement illustrated in FIG.41A, as well as any other arrangements disclosed herein or equivalentsthereof, the helical angle 10009 of the cut ranges from 10 to 80 degrees(e.g., 10-15, 1-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55,55-60, 60-65, 65-70, 70-75, 75-80 degrees, angles between the foregoingranges, etc.) relative to the longitudinal axis of the tube 10001. Insome embodiments, the helical angle 10009 ranges from 15 to 75 degrees(e.g., 20 to 70 degrees, 30 to 60 degrees, 15 to 30 degrees, 25 to 40degrees, 40 to 60 degrees, 60 to 75 degrees, etc.).

According to some embodiments, as with other arrangements disclosedherein, the sleeve 10002 is disposed within the lumen of the tube 10001.In some configurations, the tube 10001 has a smaller diameter (e.g.,inner diameter) at or along the distal end to form a shelf 10004 thatprevents forward movement of the sleeve 10002 relative to the tube10001. However, any other configuration can be used that preventsforward movement of the sleeve relative to the tube. For example, thesleeve and the tube can be coupled (e.g., via one or more attachmentmethods or devices, directly or indirectly) along the distal end, using,for instance and without limitation, adhesives, welds or other weldingprocedures, brazing, soldering, other heat based methods ortechnologies, mechanical linking and/or the like. Alternatively, thesleeve 10002 and the tube 10001 can have one or more elements thatinteract with an electromagnetic field, wherein said elements may be oneof: a magnet, a ferromagnetic material, an electret, a material capableof holding an electrical charge, a wire, and a coil configured to carrycurrent and generate a magnetic field. In some embodiments, the sleeve10002 abuts the shelf 10004 to transmit longitudinal force from thesleeve 10002 to the tube 10001. In some embodiments, the sleeve 10002may be coupled to the tube 10001 at a point distal to the helical orspiral cut 10003 (e.g., the partial thickness cut), such as, forinstance, at the shelf 10004, and can be selectively advanced and/orretracted within the tube 10001. As noted herein, in some embodiments,such advancement and retraction of the sleeve 10002 results inadvancement or retraction of the tube 10001 relative to the sleevedistal to the partial thickness helical or spiral cut 10003.

In some embodiments, the coupling means or mechanism between the sleeve10002 and the tube 10001 can be reversed. For instance, a solderconnection can be melted or severed by application of electric currentor heat to release the sleeve 10002 from the tube 10001. Means ofcoupling the sleeve 10002 and tube 10001 include, but are not limitedto, one or more of: frictional fit, adhesives (e.g., acrylic-basedadhesives (e.g., cyanoacrylate), epoxies, silicone, thermosettingresins, polyurethanes, other suitable adhesives, etc.), welding,brazing, soldering, mechanical linking or coupling and/or the like.

According to some configurations, the tube, 10001 and/or the sleeve10002 can comprise one or more of a variety of materials, including,without limitation, polyimide, polyurethane, polyether block amides(such as Pebax®), nylon, other polymers, nitinol, stainless steelbraiding, coiled wire, hollow helical stranded tubing, other metalsand/or alloys and/or any other natural or synthetic materials, asdesired or required.

In some embodiments, the partial thickness cut 10003 is elastic and canundergo elongation and/or contraction. In some configurations, in lightof the relative decreased thickness as compared to the rest of the tube10001, the partial thickness cut 10003 preferentially undergoeselongation. The lumen of the tube 10001 and outer surface of the sleeve10002 preferentially have a low coefficient of friction. For example, insome embodiments, the surfaces and/or components that contact each othercan include relatively low friction materials, coatings, layers, etc.,such as for example, PTFE, hydrophilic materials, other polymericmaterials, etc. In addition the distal aspect of the tube 10001 mayhave, but is not limited to, a straight, angled, and reverse curvedshape.

FIG. 42A schematically illustrates a medical device 14010 according toanother embodiment of the present application. In some embodiments, asillustrated, the device 14010 comprises a tube 14011, an outer sheath14015 and a handle assembly 14020. As shown in FIG. 42A, the handleassembly 14020 can comprise a proximal component or portion 14021 and adistal component or portion 14022. In some embodiments, the distalcomponent or portion 14022 is coupled to the proximal end of the tube14011, and the proximal component or portion 14021 is coupled to theproximal end of the tube 14011. The distal component 14022 can becoupled to the proximal end of the outer sheath 14015.

With continued reference to FIG. 42A, the proximal component or portion14021 and the distal component or portion 14022 each have cylindricalbodies, such that the proximal component or portion 14021 can beinserted (e.g., slidably) into or otherwise relative to the distalcomponent or portion 14022. Thus, the cross-sectional shape of thecomponents 14201, 14022 can be circular or round. In other embodiments,however, the proximal and distal components can include any othercross-sectional shape (e.g., square or rectangular, other polygonal,oval, irregular, etc.), as desired or required. Regardless of theirexact shape, size and other characteristics, the proximal and distalcomponents or portions 14021, 14022 can be slidably or otherwise movablerelative to each other.

In the illustrated embodiment, the tube 14011 is disposed within thelumen of the outer sheath 14015. Each of the tube 14011 and the outersheath 14015 can comprise one or more of a variety of materials,including, but not limited to, polyimide, polyurethane, polyether blockamides (such as Pebax®), nylon, other polymers, nickel titanium(Nitinol), stainless steel, stainless steel braiding, hollow helicalstranded tubing, other metals or alloys, other composites or naturalmaterials and/or the like, as desired or required. The tube 14011 can belocated within the lumen of the outer sheath 14015 such that the one ormore helical or spiral cut(s) 14013 in the distal aspect or portion ofthe tube 14011 are disposed within the lumen of the outer sheath 14015while the distal end of the tube 14011 extends beyond (e.g., distallybeyond) the outer sheath 14015. Therefore, in some embodiments, thetotal length of the tube 14011 is greater than the total length of theouter sheath 14015, while the length from the proximal end of the tubeto the distal most aspect of the cut portion of the tube is less thanthe total length of the outer sheath.

In addition, in any of the embodiments disclosed herein, as illustratedfor example in FIGS. 42B to 42E, a pull wire 14016 can be coupled orotherwise secured to the tube 14011. In the depicted configuration, thepull wire 14016 is coupled distal to the one or more helical or spiralcut(s) 14013. However, in other embodiments, the pull wire can besecured to any other part and/or any other location of the tube 14011.In yet other embodiments, any other feature or method can be used toassist in the bending or other manipulation of the device. For example,the use of shape memory materials, e.g., as discussed herein withreference to FIGS. 43A-43E, can be used and/or any other method, device,feature and/or technology, as desired or required.

FIG. 42B illustrates a longitudinal cross-sectional view of the distalend of the device 14010 of FIG. 42A. In the depicted arrangement, notension is being applied to the distal end of the tube 14011 via thepull wire 14016 such that the distal aspect of the tube 14011 is in astraight position (e.g., 0 degrees of tip deflection relative to thelongitudinal axis of the device). As shown and discussed herein withother embodiments, the tube 14011 comprises one or more cuts 14013(e.g., helical or spiral cuts) at or along the distal aspect or portionof the tube. In some arrangements, the helical or spiral cut(s) 14013has or have a cut width and helical angle. Accordingly, the end of thetube 14011 distal to the one or more helical or spiral cuts 14013 mayinclude a curve to aid in navigating the device 14010 through thevasculature. For example, such a configuration can help the usermanipulate the device 14010 through various curves and turns to access adesired portion or location of the subject's anatomy.

In some embodiments, the cut width is between 0.1 micrometers and 30millimeters (e.g., 0.1-0.2, 0.2-0.3, 0.3-0.4, 0.4-0.5, 0.5-0.6, 0.6-0.7,0.7-0.8, 0.8-0.9, 0.9-1, 1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10,10-15, 15-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80, 80-90, 90-100,100-150, 150-200, 200-250, 250-300, 300-400, 400-500, 500-600, 600-700,700-800, 800-900 micrometers, 900 micrometers to 1 millimeters, 1-2,2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10, 10-15, 15-20, 20-25, 25-30millimeters, widths between the foregoing values, etc.). In someembodiments, the cut width ranges from 0.1 millimeters to 10 millimeters(e.g., 0.5-5 millimeters). In other configurations, the cut width isless than 0.1 micrometers or greater than 30 millimeters (e.g., 30-40,40-50, 50-100, values between the foregoing, greater than 100millimeters), as desired or required for a particular application oruse.

In some embodiments, including for the arrangement illustrated in FIGS.42A to 42E, as well as any other arrangements disclosed herein orequivalents thereof, the helical angle of the cut ranges from 10 to 80degrees (e.g., 10-15, 1-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50,50-55, 55-60, 60-65, 65-70, 70-75, 75-80 degrees, angles between theforegoing ranges, etc.) relative to the longitudinal axis of the tube14011. In some embodiments, the helical angle ranges from 15 to 75degrees (e.g., 20 to 70 degrees, 30 to 60 degrees, etc.).

With continued reference to the embodiment illustrated in FIGS. 42A to42E, adjacent or contacting surfaces of the lumen or opening of theouter sheath 14015 and the tube 14011 comprise a low coefficient offriction. For example, these components can include contacting surfaceswith relatively low-friction materials or coatings, such as, withoutlimitation PTFE, hydrophilic coatings or materials (e.g., and withoutlimitation, from companies such as BioCoat, DSM Medical, Surmodics, ASTProducts, Hydromer, Surface Solutions Labs, Harland Medical, BayerMaterial Science, Medi-Solve, AdvanSource Biomaterials (e.g. HYDAK®,Comfortcoat™, LubriLast®, Aquacoat, Lubricient®, Baymedix CL, Hydromer,)and/or the like.

FIG. 42C illustrates a longitudinal cross-sectional view of the distalend of the device in FIG. 42A. In the depicted orientation, tension isbeing applied to the pull wire 14016 such that the distal aspect orportion of the tube 14011 is deflected 90 degrees or approximately 90degrees relative to the longitudinal axis of the tube 14011. In someembodiments, the distal end of the tube 14011 can be deflected at any ofa variety of angles relative to the longitudinal axis of the tube 14011,including without limitation angles between 0 and 270 degrees (e.g. 0-30degrees, 0-45 degrees, 0-60 degrees, 0-90 degrees, 0-120 degrees, 0-150degrees, 0-180 degrees, 0-210 degrees, 0-240 degrees, 0-270 degrees,15-30 degrees, 15-45 degrees, 15-60 degrees, 15-90 degrees, 15-120degrees, 15-150 degrees, 15-180 degrees, 15-210 degrees, 15-240 degrees,15-270 degrees, 30-45 degrees, 30-60 degrees, 30-90 degrees, 30-120degrees, 30-150 degrees, 30-180 degrees, 30-210 degrees, 30-240 degrees,30-270 degrees, 45-60 degrees, 45-90 degrees, 45-120 degrees, 45-150degrees, 45-180 degrees, 45-210 degrees, 45-240 degrees, 45-270 degrees,60-90 degrees, 60-120 degrees, 60-150 degrees, 60-180 degrees, 60-210degrees, 60-240 degrees, 60-270 degrees, 75-90 degrees, 75-120 degrees,75-150 degrees, 75-180 degrees, 75-210 degrees, 75-240 degrees, 75-270degrees, 90-120 degrees, 90-150 degrees, 90-180 degrees, 90-210 degrees,90-240 degrees, and 90-270 degrees). FIG. 42D illustrates a transversecross section of FIG. 42B through lines D-D′, while FIG. 42F illustratesa transverse cross section of FIG. 42B through lines E-E′.

FIG. 43A schematically illustrates a medical device 14110 according toanother embodiment of the present application. As with otherarrangements disclosed herein, the depicted device 14110 includes a tube14111, an outer sheath 14115 and a handle assembly 14120. The handleassembly 14120 can include a proximal component or portion 14121 and adistal component or portion 14122. The distal component 14122 can becoupled to the proximal end of the tube 14111. The proximal component14121 can be coupled or otherwise secured to the proximal end of thetube 14111. In some embodiments, the distal component 14122 is coupledor otherwise secured to the proximal end of the outer sheath 14115.

With continued reference to FIG. 43A, the proximal component or portion14121 and the distal component or portion 14122 each have cylindricalbodies, such that the proximal component or portion 14121 can beinserted (e.g., slidably) into or otherwise relative to the distalcomponent or portion 14122. Thus, the cross-sectional shape of thecomponents 14121, 14122 can be circular or round. In other embodiments,however, the proximal and distal components can include any othercross-sectional shape (e.g., square or rectangular, other polygonal,oval, irregular, etc.), as desired or required. Regardless of theirexact shape, size and other characteristics, the proximal and distalcomponents or portions 14121, 14122 can be slidably or otherwise movablerelative to each other.

The tube 14111 and the outer sheath 14115 can comprise one or more of avariety of materials, including, but not limited to, polyimide,polyurethane, polyether block amides (such as Pebax®), nylon, otherpolymers, nickel titanium (Nitinol), stainless steel, stainless steelbraiding, hollow helical stranded tubing, other metals or alloys and/orany other material, as desired or required.

In some embodiments, the tube 14111 is located within the lumen of theouter sheath 14115 such that the one or more cuts 4113 (e.g., helical orspiral cuts) in the distal aspect of the tube 14111 are disposed orotherwise positioned within the lumen of the outer sheath 14115 whilethe distal end of the tube 14111 extends beyond the outer sheath 14115.Therefore, in some arrangements, the total length of the tube 14111 isgreater than the total length of the outer sheath 14115, while thelength from the proximal end of the tube to the distalmost aspect of thecut portion of the tube is less than the total length of the outersheath.

In addition, according to some configurations, a shape memory element14116 can be coupled or otherwise secured to the tube 14111 distal tothe one or more cuts 14113 (e.g., helical or spiral cuts). The shapememory element 14116 can include, but is not limited to, one or moreshape memory alloys and/or other materials or configurations, such as,for example, Nitinol, other shape memory polymers, etc. In oneembodiment, the shape memory element 14116 can be under phase/shapetransformation via Joule heating, wherein the shape memory element 14116is coupled to two or more wires 14117 and 14119. In such configurations,one wire 14117 can be coupled to the proximal end of the shape memoryelement 14116 and a second wire 14119 is coupled to an electricallyconductive band 14118. In some embodiments, the electrically conductiveband 14118 is coupled or otherwise secured (e.g., directly orindirectly) to the distal end of the shape memory element 14116. Theelectrically conductive band 14118 can comprise, but is not limited to,one or more materials, such as, for example, platinum, gold, palladium,stainless steel and/or any other metal and/or alloy. In someembodiments, the electrically conductive band 14118 can advantageouslyserve as a radiopaque marker during use of the device within theanatomy.

FIG. 43B illustrates a longitudinal cross-sectional view of the distalend of the device 14110 of FIG. 43A when the shape memory element 14116is applied to the distal end of the tube 14111 such that the distalaspect of the tube 14111 is in a straight position (e.g., 0 degrees oftip deflection relative to the longitudinal axis of the device). In thedepicted arrangement, one or more helical or spiral cut(s) 14113 arepresent in the distal aspect or portion of the tube 14111. As discussedwith reference to other embodiments herein, the cuts 14113 include a cutwidth and helical angle.

In some embodiments, the cut width is between 0.1 micrometers and 30millimeters (e.g., 0.1-0.2, 0.2-0.3, 0.3-0.4, 0.4-0.5, 0.5-0.6, 0.6-0.7,0.7-0.8, 0.8-0.9, 0.9-1, 1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10,10-15, 15-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80, 80-90, 90-100,100-150, 150-200, 200-250, 250-300, 300-400, 400-500, 500-600, 600-700,700-800, 800-900 micrometers, 900 micrometers to 1 millimeters, 1-2,2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10, 10-15, 15-20, 20-25, 25-30millimeters, widths between the foregoing values, etc.). In someembodiments, the cut width ranges from 0.1 millimeters to 10 millimeters(e.g., 0.5-5 millimeters). In other configurations, the cut width isless than 0.1 micrometers or greater than 30 millimeters (e.g., 30-40,40-50, 50-100, values between the foregoing, greater than 100millimeters), as desired or required for a particular application oruse.

In some embodiments, including for the arrangement illustrated in FIG.43A, as well as any other arrangements disclosed herein or equivalentsthereof, the helical angle of the cut ranges from 10 to 80 degrees(e.g., 10-15, 1-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55,55-60, 60-65, 65-70, 70-75, 75-80 degrees, angles between the foregoingranges, etc.) relative to the longitudinal axis of the tube 14111. Insome embodiments, the helical angle ranges from 15 to 75 degrees (e.g.,20 to 70 degrees, 30 to 60 degrees, etc.).

In some embodiments, adjacent contacting surfaces of the lumen of theouter sheath 14115 and the tube 14111 can advantageously have a lowcoefficient of friction, including but not limited to having materialsor coating with relatively low friction properties, such as, e.g., PTFE,hydrophilic coatings or materials (e.g., from companies such as, forinstance and without limitation, BioCoat, DSM Medical, Surmodics, ASTProducts, Hydromer, Surface Solutions Labs, Harland Medical, BayerMaterial Science, Medi-Solve, AdvanSource Biomaterials (e.g. HYDAK®,Comfortcoat™, LubriLast®, Aquacoat, Lubricient®, Baymedix CL,Hydromer,)) and/or the like. FIG. 43C illustrates a longitudinalcross-sectional view of the distal end of the device in FIG. 43A. In thedepicted orientation, current is being applied to the shape memoryelement 14116 via the wires 14117 and 14119 such that the distal aspector portion of the tube 14111 is deflected by 90 degrees (e.g., orapproximately 90 degrees) relative to the longitudinal axis of the tube14111. FIG. 43D illustrates a transverse cross sectional vie of thedevice of FIG. 43B through lines D-D′, while FIG. 43E illustrates atransverse cross sectional view of the device through lines E-E′. Insome embodiments, the distal end of the tube 14111 can be deflected atany of a variety of angles relative to the longitudinal axis of the tube14111, including, for example, and without limitation, angles between 0and 270 degrees (e.g. 0-30 degrees, 0-45 degrees, 0-60 degrees, 0-90degrees, 0-120 degrees, 0-150 degrees, 0-180 degrees, 0-210 degrees,0-240 degrees, 0-270 degrees, 15-30 degrees, 15-45 degrees, 15-60degrees, 15-90 degrees, 15-120 degrees, 15-150 degrees, 150-180 degrees,15-210 degrees, 15-240 degrees, 15-270 degrees, 30-45 degrees, 30-60degrees, 30-90 degrees, 30-120 degrees, 30-150 degrees, 30-180 degrees,30-210 degrees, 30-240 degrees, 30-270 degrees, 45-60 degrees, 45-90degrees, 45-120 degrees, 45-150 degrees, 45-180 degrees, 45-210 degrees,45-240 degrees, 45-270 degrees, 60-90 degrees, 60-120 degrees, 60-150degrees, 60-180 degrees, 60-210 degrees, 60-240 degrees, 60-270 degrees,75-90 degrees, 75-120 degrees, 75-150 degrees, 75-180 degrees, 75-210degrees, 75-240 degrees, 75-270 degrees, 90-120 degrees, 90-150 degrees,90-180 degrees, 90-210 degrees, 90-240 degrees, and 90-270 degrees).

FIG. 44A illustrates a diagram of a medical device 14210 according toanother embodiment of the present application. As shown and as discussedherein with reference to other embodiments, the device 14210 comprises atube 14211, an outer sheath 14215, a sleeve 14212 and a handle assembly14220. The handle assembly 14220 can include a proximal component orportion 14221 and a distal component or portion 14222. The distalcomponent 14222 can be coupled to the proximal end of the tube 14211.The proximal component 14221 can be coupled to the proximal end of thesleeve 14212.

With continued reference to FIG. 44A, the proximal component 14221 cancomprise a swivel member or portion 14229 that extends circumferentiallyaround the proximal end of the sleeve 14212. In such embodiments, theproximal component 14221 can rotate independent of the sleeve 14212. Insome arrangements, the proximal component 14221 and the distal component14222 each have cylindrical bodies, such that the proximal component14221 may be inserted into the distal component 14222. The tube 14211can be disposed or otherwise positioned within the lumen of the outersheath 14215. The tube 14211, the sleeve 14212, the outer sheath 14215and/or any other portion or component of the device can comprise one ormore of a variety of materials, including, but not limited to,polyimide, polyurethane, polyether block amides (such as Pebax®), nylon,other polymer, nickel titanium (Nitinol), stainless steel, stainlesssteel braiding, hollow helical stranded tubing, other metals or alloysand/or any other material.

In some embodiments, the distal end of the tube 14211 can include, butis not limited to, one or more angled or reverse curved shapes. In thedepicted arrangement, the tube 14211 is located within the lumen of theouter sheath 14215, such that the one or more helical or spiral cut(s)14213 (and/or any other cuts or features) in the distal aspect of thetube 14211 are disposed within the lumen of the outer sheath 14215. Thedistal end of the tube 14211 can extend beyond the outer sheath 14215.In some embodiments, therefore, the total length of the tube is greaterthan the total length of the outer sheath, while the length from theproximal end of the tube to the distal most aspect of the cut portion ofthe tube is less than the total length of the outer sheath.

In some embodiments, a sleeve 14212 is disposed within the lumen of thetube 14211. The tube 14211 can have a reduced inner diameter on thedistal end to form a shelf 14214 that prevents or otherwise limitsforward movement of the sleeve 14212. In some embodiments, the sleeve14212 abuts the shelf 14214 to transmit longitudinal force from thesleeve 14212 to the tube 14211. In some embodiments, the sleeve 14212 iscoupled or otherwise secured to the tube 14211 at a point distal to theone or more helical or spiral cut(s) 14213, such as at the shelf 14214,and can be advanced or retracted within the tube 14211. In someconfigurations, advancement or retraction of the sleeve 14212 results inadvancement or retraction of the tube 14211 distal to the one or morecut 14213. In some embodiments, the coupling means may be reversible,such as a solder connection that can be melted by application ofelectric current or heat to release the sleeve 14212 from the tube14211. Means of coupling the sleeve 14212 and tube 14211 include, butare not limited to, one or more of the following: frictional fit, pressfit, adhesives (e.g., acrylic based adhesives (e.g. cyanoacrylate),epoxies, silicone, thermosetting resins, polyurethanes and/or the like),welding, brazing, soldering, mechanical linking and/or any othercoupling method, device and/or technology, as desired or required.

According to some embodiments, the lumen of the tube 14211 and outersurface of the sleeve 14212 preferentially have a low coefficient offriction. For example, adjacent contacting surfaces of the tube 14211and the sleeve 14212 can comprise PTFE, hydrophilic materials/coatingsfrom companies such as, for example and without limitation, BioCoat, DSMMedical, Surmodics, AST Products, Hydromer, Surface Solutions Labs,Harland Medical, Bayer Material Science, Medi-Solve, AdvanSourceBiomaterials (e.g. HYDAK®, Comfortcoat™, LubriLast®, Aquacoat,Lubricient®, Baymedix CL, Hydromer,) and/or the like.

FIG. 44B illustrates a longitudinal cross-sectional view of the deviceof FIG. 44A. In the depicted orientation, the outer sheath is notengaging the curved portion of the tube, resulting in a 180 degree(e.g., or approximately a 180 degree) curvature of distal aspect orportion of the tube relative to the longitudinal axis. FIG. 44Cillustrates a longitudinal cross-sectional view of the distal end of thedevice of FIG. 44A. In the depicted orientation, the outer sheathpartially engages the curved portion of the tube resulting in a 90degree (e.g., approximately a 90 degree) curvature of distal aspect ofthe tube relative to the longitudinal axis of the device. FIG. 44Dillustrates a longitudinal cross-sectional view of the distal end of thedevice of FIG. 44A. In the depicted orientation, the outer sheathfurther engages the curved portion of the tube resulting in a 45 degree(e.g., approximately a 45 degree) curvature of distal aspect of the tuberelative to the longitudinal axis. Further, FIG. 44E illustrates alongitudinal cross-sectional view of the distal end of the device ofFIG. 44A. In the depicted orientation, the outer sheath fully engagesthe curved portion of the tube resulting in straightening (0 degreecurvature relative to the longitudinal axis) of distal aspect of thetube. FIG. 44F illustrates a transverse cross section of FIG. 44Ethrough lines F-F′, while FIG. 44G illustrates a transverse crosssection of FIG. 44E through lines G-G′. In some embodiments, the curvein the distal end of the tube 14211 can be have a variety of anglesrelative to the longitudinal axis of the tube 14211, including withoutlimitation angles between 10 and 270 degrees (e.g., 60 to 180, 90 to145, 10 to 45, 30 to 90, 30 to 60, 45 to 90, 90 to 100, 100 to 110, 110to 120, 120 to 130, 130 to 140, 140 to 150, 150 to 160, 160 to 170, 170to 180, 180 to 190, 190 to 200, 200 to 210, 210 to 220, 220 to 230, 230to 240, 240 to 250, 250-260, 260 to 270, ranges between the foregoing,etc.).

It will now be evident to those skilled in the art that there has beendescribed herein methods and apparatuses for improved rotation of thedistal aspect of a device. Although the inventions hereof have beendescribed by way of several embodiments, it will be evident that otheradaptations and modifications can be employed without departing from thespirit and scope thereof. The terms and expressions employed herein havebeen used as terms of description and not of limitation; and thus, thereis no intent of excluding equivalents, but on the contrary it isintended to cover any and all equivalents that may be employed withoutdeparting from the spirit and scope of the inventions.

While the disclosure has been described with reference to certainembodiments, it will be understood that various changes may be made andequivalents may be substituted for elements thereof without departingfrom the scope of the disclosure. In addition, many modifications willbe appreciated to adapt a particular instrument, situation or materialto the teachings of the disclosure without departing from the essentialscope thereof. Therefore, it is intended that the disclosure not belimited to the particular embodiment disclosed as the best modecontemplated for carrying out this disclosure, but that the disclosurewill include all embodiments falling within the scope of the appendedclaims.

Although several embodiments and examples are disclosed herein, thepresent application extends beyond the specifically disclosedembodiments to other alternative embodiments and/or uses of theinventions and modifications and equivalents thereof. It is alsocontemplated that various combinations or subcombinations of thespecific features and aspects of the embodiments may be made and stillfall within the scope of the inventions. Accordingly, it should beunderstood that various features and aspects of the disclosedembodiments can be combine with or substituted for one another in orderto form varying modes of the disclosed inventions. Thus, it is intendedthat the scope of the present inventions herein disclosed should not belimited by the particular disclosed embodiments described above, butshould be determined only by a fair reading of the claims that follow.

While the embodiments disclosed herein are susceptible to variousmodifications, and alternative forms, specific examples thereof havebeen shown in the drawings and are herein described in detail. It shouldbe understood, however, that the inventions are not to be limited to theparticular forms or methods disclosed, but, to the contrary, theinventions are to cover all modifications, equivalents, and alternativesfalling within the spirit and scope of the various embodiments describedand the appended claims. Any methods disclosed herein need not beperformed in the order recited. The methods disclosed herein includecertain actions taken by a practitioner; however, they can also includeany third-party instruction of those actions, either expressly or byimplication. For example, actions such as “advancing a catheter ormicrocatheter” or “advancing one portion of the device (e.g., linearly)relative to another portion of the device to rotate the distal end ofthe device” include instructing advancing a catheter” or “instructingadvancing one portion of the device,” respectively. The ranges disclosedherein also encompass any and all overlap, sub-ranges, and combinationsthereof. Language such as “up to,” “at least,” “greater than,” “lessthan,” “between,” and the like includes the number recited. Numberspreceded by a term such as “about” or “approximately” include therecited numbers. For example, “about 10 mm” includes “10 mm.” Terms orphrases preceded by a term such as “substantially” include the recitedterm or phrase. For example, “substantially parallel” includes“parallel.”

1-20. (canceled)
 21. A device comprising: a tubular member with alongitudinal axis, the tubular member having a distal end; at least onepartial cut located at, along or near the distal end of the tubularmember, the at least one partial cut comprising an orientation that isangled relative to both the longitudinal axis and an axis transverse tothe longitudinal axis; and a displacer member configured to be slidablymoved relative to the tubular member and configured to impart alongitudinal force on the tubular member along or near the distal end ofthe tubular member; wherein a distal portion of the device is angledrelative to the longitudinal axis so that the distal portion isangularly offset relative to the longitudinal axis; and wherein thedistal end of the tubular member along the at least one partial cut isconfigured to at least partially rotate about the longitudinal axis whenthe displacer member is moved relative to the tubular member toselectively change the position of the distal end of the tubular member.22. The device of claim 21, wherein the displacer member is positionedwithin an interior of the tubular member.
 23. The device of claim 21,wherein the displacer member is positioned along an exterior of thetubular member.
 24. The device of claim 21, wherein the at least onepartial cut extends throughout an entire thickness of a wall of thetubular member.
 25. The device of claim 21, wherein the at least onepartial cut does not extend throughout an entire thickness of a wall ofthe tubular member.
 26. The device of claim 21, wherein the at least onepartial cut comprises a spiral or helical shape.
 27. The device of claim21, wherein an angle of the at least one partial cut relative to thelongitudinal axis is between 10 and 80 degrees.
 28. The device of claim21, wherein the displacer member is configured to contact the tubularmember along the distal end of the tubular member.
 29. The device ofclaim 21, wherein the displacer member is not secured to the tubularmember.
 30. The device of claim 21, further comprising at least oneouter member or coating positioned around the tubular member and thedisplacer member.
 31. The device of claim 21, further comprising atleast one pull member to facilitate steering of the device within ananatomy of a subject.
 32. The device of claim 21, further comprising ahandle assembly, wherein a first portion of the handle assembly issecured to the tubular member and a second portion of the handleassembly is secured to the displacer member, wherein movement of thefirst portion relative to the second portion of the handle assemblyfacilitates movement of the tubular member relative to the displacermember.
 33. A device comprising: a first elongate member comprising alongitudinal axis, a proximal end and a distal end; at least one partialcut located at, along or near the distal end of the first elongatemember; and a second elongate member configured to be slidably movedrelative to the first elongate member and configured to impart alongitudinal force on the first elongate member when moved relative tothe first elongate member; wherein a distal portion of the device isangled relative to the longitudinal axis; and wherein the distal end ofthe first elongate member along the at least one partial cut isconfigured to at least partially rotate about the longitudinal axis whenthe second elongate member is moved relative to the first elongatemember to selectively change the position of the distal end of the firstelongate member.
 34. The device of claim 33, wherein the second elongatemember is positioned within an interior of the first elongate member.35. The device of claim 33, wherein the second elongate member ispositioned along an exterior of the first elongate member.
 36. Thedevice of claim 33, wherein the at least one partial cut extendsthroughout an entire thickness of a wall of the first elongate member.37. The device of claim 33, wherein the at least one partial cut doesnot extend throughout an entire thickness of a wall of the firstelongate member.
 38. The device of claim 33, wherein the second elongatemember is not secured to the first member.
 39. A device comprising: afirst elongate member comprising a longitudinal axis; at least onefeature located at, along or near the distal end of the first elongatemember, the at least one feature comprising a modification or avariation to a wall of the first elongate member; and a second elongatemember positioned collinearly relative to the first elongate member andconfigured to impart a longitudinal force on the first elongate memberwhen there is relative motion between the second elongate member and thefirst elongate member; wherein a distal portion of the device is angledrelative to the longitudinal axis; and wherein a distal end of the firstelongate member is configured to at least partially rotate when thesecond elongate member is moved relative to the first elongate member.40. The device of claim 39, wherein the at least one feature comprises apartial or complete cut within a wall of the first elongate member.